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How Much Marijuana Can I Yield Per Plant? A Pound!

How Much Marijuana Can I Yield Per Plant? A Pound!

One of the most popular questions regarding marijuana is “How much marijuana can one plant produce?” or “How much will a 600 watt HPS yield?” There are no simple answers to this question as each situation depends on a number of variables.

Many people take up growing weed and they have a variety of reasons for doing so. In every case, you want to get the most out of your crop. Whether you’re growing for medical reasons or you just want to make a little money on the side, the overall yield is a top priority for all growers.

In this article I will discuss all everything there is to know about marijuana yields. Got questions or tips? Place them in the comments below this article.

Don’t want to read? Watch the video!

Maximum yield per plant indoors

Lights are of the utmost importance when you’re growing indoors. Experienced growers can produce about a gram of marijuana per watt of light (1 gram = 0,035 oz). So, a 400-watt HPS grow light can potentially translate to 400 grams or 14 oz of dried, usable cannabis.

HPS grow light

600watt HPS grow light with reflector

Likewise, a grow room with 1200 watts of light can yield 1.2 kilograms or 42 oz of cannabis. Having the right equipment, adequate nutrient solutions, beneficial air quality, and other valuable factors is important for producing the highest yields possible. Making sure the plants have space to grow is also key.

Tip: make sure to download my free Grow Bible and learn how to maximize your yield

Average expected yield per plant indoor from soil

If you are using soil to grow indoors, you can expect somewhat less of a yield than if you’d grown hydroponically. This is because hydro growers can fully control the amount of nutrients their plants receive.

Check out these pics below. You can see that hydro plants grow faster than soil plants
Pictures powered

Although soil growing can potentially lower your yield, it also is easier to grow. This is because it not only creates a buffer for error but it also holds nutrients within the soil. When growing in soil, there is room to make mistakes with pH and TDS and pay for it in yield. In terms of numbers, expect a maximum of 1 gram per watt. That means a 600watt lamp can produce 600 grams of marijuana or 21 ounces.

Average expected yield per plant indoor from hydro

Growing hydroponically yields up to 20% more, as long as you do not make any mistakes. With hydro growing, there is no room for errors. You must be very careful about the TDS and pH levels because the roots are directly in water (and not soil) and incorrect levels can immediately effect the plants.

Check out these pics below. You can see that hydro roots grow faster than soil roots
Pictures powered

There are rarely small mistakes while growing hydroponically. Even the most minor error can ruin your yield. However, those who do it correctly will be rewarded. You can expect up to 1.2 gram per watt, which means a 600watt HPS lamp can give you 720 grams of marijuana or over 25 ounces.

Cannabis plant yield calculator

A simple way to calculate your yield is by using a cannabis plant yield calculator. Yield O Rama has an excellent one that lets you select the type of light you’re using, the light intensity (lumen), your level of growing experience and your growing medium.

Marijuana yield calculator

Results from input cannabis plant yield calculator. Try the calculator yourself at this link

When using the yield calculator, keep in mind that an HPS grow light produces around 150 lumens per watt. For the exact amount of lumen that your bulb produces, check with the manufacturer.

The calculator has a few limitations- you cannot adjust it for the strain, and it’s only for indoor grows, but it is still quite handy. Check out the cannabis yield calculator here.

Marijuana yields in imperial measurements

  • An average of around 1.5 to 2.0 oz  (3.5 oz for advanced growers) with 200-watt CFL lamps in a grow cabinet that measures 3.5 x 1.5 x 6.5 ft.
  • An average of around 3.0 to 5.0 oz  (9.0 oz for advanced growers) with a 250-watt HPS lamp in a grow cabinet that measures 3.5 x 1.5 x 6.5 ft.
  • An average of around 4.5 to 9.0 oz (14 oz for advanced growers) with a 400-watt HPS lamp in a grow room that measures 3.5 x 3.5 x 7 ft.
  • An average of around 5.0 to 10 oz (21 for advanced growers) with a 600-watt HPS lamp in a grow room that measures 4 x 4 x 8 ft.
  • An average of around 9.0 to 18 oz (36 for advanced growers) with a 1000-watt HPS lamp in a grow room that measures 5 x 5 x 8 ft.
hps lamps distance yield

Different HPS lamps with distance for best yield

Marijuana yields in metric measurements

  • An average of around 40 to 60 grams  (100 for advanced growers) with 200-watt CFL lamps in a grow cabinet that measures 1 x 0.5 x 2 m
  • An average of around 80 to 150 grams (250 for advanced growers) with a 250-watt HPS lamp in a grow cabinet that measures 1 x 0.5 x 2 m
  • An average of around 100 to 250 grams (400 for advanced growers) with a 400-watt HPS lamp in a grow room that measures 1 x 1 x 2.5 m,
  • An average of around 150 to 300 grams (600 for advanced growers) with a 600-watt HPS lamp in a grow room that measures 1.2 x 1.2 x 2.5 m.
  • An average of around 250 to 500 grams (1000 for advanced growers) with a 1000-watt HPS lamp in a grow room that measures 1.5 x 1.5 x 2.5 m.
Grow place with proper metric measurements

Grow room with 1 x 600 watt HPS and Adjust a Wing reflector

How much does one marijuana plant produce

Indoor growth doesn’t bring with it a lot of certainty in terms of yield per plant. If you have only four plants per lamp, then you’ll yield much more than you would with total of sixteen plants for every lamp.

Tip: make sure to download my free Grow Bible  for more information about setting up your grow room

You should consider these things prior to choosing how many plants you want to grow:

  • If you’ve only got 4 plants, your yield will be 25% less if one gets a disease or dies
  • Vegetative growth lasts longer with only four plants. You should want to force flowering when the tips of the leaves are touching. If there are more plants, the leaves touch quicker
  • Four plants are easier to manage than sixteen
  • If someone catches you, you only have four plants to your name
Small grow room

Small grow room with seven plants under CFL  grow light

Either way, growing four plants using a 600-watt HPS lamp could yield about 150 grams or 5.0 oz per plant. Sixteen plants that are grown under a 600-watt HPS lamp could produce about 37.5 grams or 1.3 oz of marijuana per plant. And if you only grow one huge plant per  600 watt HPS it could produce a pound of marijuana per plant!

Screen of green yield per plant

The Screen of Green (SCROG) technique is an excellent way to increase your yield. The idea is to top your plants and place a screen at 15 inches above your plants. When a branch grows 4 inches through the filter, tie it to the screen horizontally. Continue attaching the branches until you get a nice ‘blanket’ of tops. Before you continue reading, check these beautiful scrog pics from my marijuana education center, bergmans lab.

Here are three reasons why growing with a screen of green technique increases your yield:

1. No wasted light
Any light that hits the floor or walls is wasted energy. With the SCROG method, you create a thick ‘blanket of leaves’ out of your plant that prevents light from being wasted, and instead forces it to be absorbed by the leaves.

2. All plants are the same height
When every plant is the same height, each will receive the maximum amount of light. With this method, there are no plants or branches in the shade, and you can place the lamp as low as possible, as long as temperatures don’t exceed 77 Fahrenheit.

3. No fluffy or soft buds
Because you prune the bottom branches that don’t grow through the screen, the plant doesn’t waste any energy on developing the small, soft buds at the base of your plant. (FYI, they never ripen.) Your plants also don’t waste energy on leaves and branches it doesn’t need. All of its energy goes to the top colas!

I’ve used the screen of green method for many grows and I’ve always been satisfied with the results. If you use it, your yield can increase by 10 to 20%. You’ll need to master the basic grow skills of watering and pruning, however.

1000 watt HPS yield

Does a 1000-watt HPS yield more than a 600-watt HPS? Well, not necessarily. While a 1000-watt HPS bulb produces much more light than a 600-watt bulb, a plant cannot convert all that light into energy. It will need more CO2.

There is around 350-400 ppm of CO2 in the air. Indoor marijuana plants will use this CO2, combined with energy from the light to create sugars. If you grow in a closed grow room without an air inlet, the plants will use half of this CO2 within an hour and then slow down sugar production because CO2 levels are dangerously low. This is the reason why you have to ventilate your grow room continuously with fresh, CO2 rich air from outside.

Tip: make sure to download my free Grow Bible and learn how to increase your yield with CO2

With 350 to 400 ppm of CO2 in the air, your marijuana plants cannot create more sugars than the light from a 600-watt HPS bulb produces. So your yield will not be higher if you use a 1000watt HPS lamp under normal circumstances.

On the other hand, if you increase the CO2 levels, your plants will need more light, and in that case, a 1000-watt bulb can almost double your yield. It’s a large investment to buy the right equipment, but a 1000-watt grow light is worth it in terms of yield. Here is an interesting article about CO2 and tomato plants.

LED grow yield

There has been much said about LED lights, with many manufacturers claiming super high yields, but I haven’t seen them yet. I’ve tried a 300-watt LED grow two years ago and generated less than half of what I usually produce. Many of my friends also haven’t received desired results.

Led cannabis yield

LED grow yields will become higher in the future

An interesting fact is that commercial tomato growers haven’t switched to LED. For me, that’s a sign that they’re no better or more economical than HPS grow lights. With LED, the light intensity isn’t as strong as with HPS lights. Instead, the spectrum is more important. Read the science behind LED on

So, I can’t tell you how much you will yield with a LED grow light. If anybody has some results, please share them in the comments. I can confirm that LED lights produce a lot less heat compared to HPS lights. This will cause the plant to evaporate less water, changing the water and nutrient requirements for growers.

How much does a marijuana plant cost?

A store-bought marijuana plant will cost around $10 to $15. It will be a clone of around 5 inches tall, and they’re only available in the states that have legalized marijuana. High-quality marijuana seeds cost between $8,- and $15,-. Available all over the internet and of course in my webshop 😉

But these figures do not cover the cost of producing weed. You need to buy equipment, nutrients and keep an eye on the electricity and water costs. Here are some estimates, check my article about costs and revenues for more details.

Growing 5 marijuana plants in a 2×2 foot grow tent with 2x100watt CFL will cost you around $1000 per year and yield 0.25 pound of marijuana per harvest. With 4 harvests per year, each marijuana plant costs about $50.

What does a clone cost

Clones for sale for $15,- each at La Conte’s clone bar in Denver.

Growing 5 marijuana plants in a 4x4foot grow tent with a 600watt HPS light will cost you around $2000 per year and produce 1 pound of marijuana per harvest. With 4 harvests per year, each marijuana plant will cost around $100.

The basic equipment like filters, timers, and exhaust fans are very expensive. The price difference between a setup for 2 or 4 lights is only 20% higher, but the yield doubles. Read my article on revenues and costs of growing marijuana for more information.

How to yield a pound per plant indoors

It is actually not very hard to yield a pound per plant indoors. It only takes a lot of time and a lot of space. Want to feature your 1-pounder indoor plant on our blog? Send me a picture!

If you want to grow a one pound marijuana plant you need a 4 x 4 foot grow tent or other similar sized space, and a 600 – watt HPS grow light. Under ideal circumstances, a 600watt light can produce well over a pound of cannabis. If you limit your grow to just one plant, it can produce over a pound of weed. The picture below shows one plant under 600watt.

One pound plant under 600 watt

One plant under 600 watt can produce a pound of weed. Picture by: Rolling Stoned

You have to prune and trim your plant a lot otherwise it will grow through the ceiling. Scrogging is the way to go to cover 10 square feet with one plant. Read my article How to scrog for more information.

Growing a one-pounder is a fun project, but there are some downsides. You need to veg the plant for very long until the entire floor is covered with leaves, so no light goes to waste. Plus, if your plant gets sick or anything, you don’t have replacements. But it can be done! If you pull it off, show me the results!

How much marijuana does one outdoor plant yield

Under perfect conditions, you can expect yields to extend to 500 grams or 17.5 oz of marijuana per plant. Space is a necessity (at least two meters) along with water, nutrients, and a dearth of pests and diseases. If you use containers, they should be at least 50 liters or 15 gallons in size.

It’s a good idea to germinate the seeds early on to allow the plants time to grow large. It’s best to germinate indoors where you can manage the humidity and the temperature for the seedlings. Again, 500 grams (17.5 oz) per plant is possible if everything goes as planned.

500 gram yield

500 gram yield is posible

Aside from an adequate amount of sun, water, and nutrient quality, the actual genetics of the plant play a very important role. Seeds are vital and you need to have some exceptional seeds at your disposal. You can look through our cannabis seed shop to find the a strain that’s right for you. It all starts with genetics….

The difference in weight of wet and dry weed

Drying your weed slowly (10 to 14 days) in a climate controlled dark and dry place with a temperature of around 64 degrees will get you more weed in weight.

You will get about 20 % to 25 % out of your wet weed after drying, depending on the strain, the density of the buds and the way of drying. Only weigh the wet buds and not the whole plant.

drying weed dark room

Drying your plants correctly will increase your yield

Out of a well cultivated Sativa you will get approximately 20% -22% dry weed and from an Indica about 22% -25%. So out of one pound wet Amnesia Haze you will get approximately 7.4 ounces and if you dry one pound of White Widow you’ll get about 8.4 ounces. At a street price of $ 7 (Oregon) or $12 (Texas) this is very good profit.

You will end up with approximately 12.5% if you weigh the entire plant, including stems and leaves, while it’s wet

Thanks for reading and please feel free to share or comment on this article. If you order seeds from my seedshop you get full grow support and my personal email address. So if you encounter any problems during your grow process you can always contact me.

Robert Bergman


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Comment Section

185 thoughts on “How Much Marijuana Can I Yield Per Plant? A Pound!

By Andy on 24 February 2013

epic article !!

clear even to me 🙂

just can not understand, what distance should be between plants?
How many of them do you have on picture nr. 7 ?

By ilovemarijuana on 24 February 2013

Hi Andy,

There are only 5 plants in pictures 7-9. All the branches that come through the screen are gently bend and tied to the screen with tie wraps. This is called the scrog (screen of green) method. I’ll write an article on how to scrog next week.


By Andy on 24 February 2013

It is amazing. I just wondering and can not understand, how you manage to get such big buds which are almost like the main . (actually hard to say where is the main and where is a branch)

also three additional questions 🙂

1) What is the distance between plants ?

2) How many extra buds in average your plant has ?

3) What is room size ?

P.s will be impatiently waiting for “how to scrog” article 🙂


By Db420 on 17 September 2017

Hi Robert, I just started reading your grow bible after I found a blueberry kush seed in some real good bud. I have a beautiful female that I give a lot of attention to. She is 8 weeks old and about 8 1\ 2 inches tall. I use your information& my gardening skills. I am using sandy soil & what I call hillbilly grow, since I only spent $60. I am very grateful for the information in your grow bible. I want to send pics do I do it through e mail

By ilovemarijuana on 25 February 2013

Hi Andy,

There are no rules for the amount of plants etc. Did you get the pictures i sent you? Thats 5 plants in a 3 x 3 foot container. And because the plant doesn’t waste any energy on small, useless buds you get 5 to 10 huge ones per plant.

I’ll keep you posted about the article


By Andy on 26 February 2013

Yes, I got them. Sent you back mine. Just don`t be scared 🙂

I suppose, I would have many questions about your article. Waiting with impatience, because new plants are coming after about a week.

Want to try implement what you are sharing .


By Laura on 10 April 2013


I,ve been reading your articule and it is fantastic!
i only have one question about the lights, due to the space i am able to fit for growing marijuana i can only use fluorescent bulbs. i just germinated 5 plants and i am using 2 bulbs of 105w each (in fluorescent light, wich would be like 420w of an incandescent bulb, so I asumed Im using 840watts of light). so the question is; how much gr per watt will the plant yield, using 840w in fluorescent bulbs?
Thanks in advance!

By Robert Bergman on 11 April 2013

Hi Laura,

I think your fluorescent lights can yield 50 to 100 grams at best. Fluorescent lights are perfect during the vegetative fase but not the best option for flowering. Instead of two 100watt fluorescent lights you can also use one 250watt HPS bulb. One 250 watt HPS bulb can yield a maximum of 250 grams.


By Mark ohara on 3 April 2017

Hi Mark ohara pleasure meeting u got all that u sent….thank’s amazing ur. knowledge on growing…will be placing an order tomm….thanks!

By Zach on 4 November 2016

I just switched to led lights kinda as an expirement my plants are just starting but I was wondering if leds are a good or bad idea

By Jerry on 9 June 2017

How many hours a day do you leave your light on during germination

By Anonymous on 12 June 2017

dark warm area for 16 18 hours in a bowl or cup of water then switch to a moist napkin in a ziplock untill the root is long enough

By terry on 30 April 2013

Must you use metrix? I can’t spell it let alone convert it. thank you

By Valentino K on 17 October 2015

The whole world uses metric (not metrix) except you silly Brits and Americans, instead of rejecting it why not just learn it. You’ll see it’s much easier than the standard system, everything is in increments of 1s 10s and 100s. And everyone knows there’s 28grams in an ounce, just divide the total amount of grams given by 28 and you get your ounce equivalent, don’t see what’s so difficult about simple division. Great article btw Robert!!!

By Pete on 15 November 2015

To be fair, in English at least, bud prices are traditionally quoted in imperial; the ‘gramme’ is a more recent creature of retailing it at a very petty level; the customer’s choice is between a gramme or seven grammes, or quarter ounce, which might cost four or five times as much. It’s just a nice heritage thing for an enjoyable part of life; like twenty or sixteen ounce beer pints sit either side of the internationally most common 500mL.

On the other hand, crystalline drugs seem to have been in metric for decades, even in the States. With cannabis for medical purposes, the more scientific-sounding 5g unit seems to be used in the US, just as 10g is used in Uruguay.

By charley on 3 June 2016

We know what grams are we do use metric just not for drugs in America not so much but in uk most things are metric ok

By Daniel Yingling on 18 November 2016

We Americans use both every day. With Marajuana we typically use grams and Ozs. For our dispensing. I’m older and this is the way it’s been done since the 60s.

By Blazer on 15 July 2013

Using Fluros or Energy saving bulbs for the veg stage and to propergate cuttings its ideal.. if u want big vigirous plants i suggest swapping over to a Hps Or Mh Bulb they have enuff grunt to penetrate the canopy and get some big colas growing.

By jodie putilla on 16 July 2013

Thanks .im a new grower and i have gained a lot of info from you guys .thanks i’ll be back for more ..thanks again. Jodie.p

By Branden on 21 July 2013

I have a 2 foot plant outdoors, i wont
to know if I con start putin a lite on it at night to veg more

By erick on 28 July 2013

i have a place 2 m, 2m. how can i grow in this place

By Loony on 26 May 2016

Hi Erick. If I have read your question correctly, you are asking how many plants you can grow in a 2m x 2m space. I don’t know if this will assist you or not. My last grow I grew, 32 red devils & 8 White Rhino’s in a 3m x 2m space under 6 x 6oo Watt HPS & one 1000 Watt HPS. This yielded just over 200 oz’s (I’ am old school so my Oz’s are weighted in at 30 grams each) of dried plant that were on a 18/12 light cycle. 2 months on grow, 6 weeks on flower, plus two weeks to dry correctly. Hope this helps in your calculations.

By Maziar on 24 August 2016

Hi Mr loony,

I have some questions about cannabis growth and would be grateful if you could please guide me.

Best regards

By Roy ILGM on 25 August 2016

Hey Maziar, you could try our forum where we have experts and fellow growers to guide you. Happy growing!

By paul on 10 May 2017

sorry mate. just saw this post again. ask away and i will see if i can assist you.

By Money85 on 5 June 2017

Hey paul, can u help me out with some things or someone? This is my 3rd grow i. Soil

By Leon on 10 November 2013

Is the sour diesel strand/ seeds good for a beginner grow ? And if not what do you suggest ? Don’t have much space.

By Albaro G on 14 January 2014

hi, I found your article very interesting. It did leave me with a question though. if we were to use a grow room of 3x3x6.5 feet with only 2 plants, would the wattage still make a difference in the amount of buds that would be produced? I guess what I am trying to ask is that if I am planting two plants, would 400 watts give it all the light that those two plants will be able to take or will having a 600 watt lighting system still be beneficial for a cultivation as small as 2 plants compared to a 400 watt lighting system?

By jim on 18 January 2014

do some real research you believe any of this article it is totally unrealistc

By Loony on 10 May 2017

Agreed. i have never got a yield of 1gm = 1 watt in 30 + years of growing indoors. more like 0.8 per watt

By Gary on 15 September 2017

Get better at growing and you would.

By dave on 5 January 2018

he weighs his weed WET. that is all

By ataxian on 21 January 2014

What about super cropping?

One plant medical grow super cropped is better than scrog!
Scrog maybe good for commercial growers however supper cropping is more efficient for personal growing for medical conditions!

By james on 21 January 2014

I love reading about the potential these wonderful plants have. But it pains me that I’m not getting the results as such. I consider my self above a begginer but not yet an expert. Wondering if u can help me isolate the problem with my grow affecting my yeild. Thank you

By Cartel on 21 July 2014

Veg 2 plants for 6-8 weeks and you will have a qp easily

By budhunter on 22 January 2014

hi great reading 4 a none reader just 1 ? when u r chatting about how much bud 1 would get per plant r u taking about the weight when 1st croped or when its dryed out thanks keep up the great work. budhunter

By Cartel on 21 July 2014

I get 2 ounces per plant , I veg for 6-7 weeks

By Edwin Smith on 8 April 2014

Hey what’s up! Edwin Smith here I was wondering if you could answer some questions for me. I have a XXL13 Four-site current culture system with 600w KIND LED’s over each module. I want to main-line and FIM my plants in a 6.5×6.5×6.5 tent with a chiller and a active air temperature controller. I was wondering if there are any special nutrient mixes that you can let me in on so I can have an idea of some new techniques for my grow. Been doing this for about seven years now just want to get out of the normal. Can you help me just send me an email I know its hard to get to everyone. Let me know what’s up.

By RIDGEBACK XTRM on 11 June 2014

What about if you use 8 VHO florescent lights, four blue and red. Will that increase the yield for growing indoor to the advertise yield? Yields only 1 to 3 oz. per plant is not acceptable in my opinion!

By dnvest on 20 June 2014

Thank you very much for all your help, Robert! This is my 3rd year growing outdoors, but this year I have more plants. (8) And they all seem to be growing at different paces, each one unique though from the same strain of seed. (Medijuana Feminized) Strange. And just as in the previous few years, I’m basically winging it. lol! But I have to say, WORM CASTINGS do wonders during the earlier stages. Is there anything wrong with using mainly worm castings & a little Miracle Grow watering from time-to-time until the flowering stage begins? Thanks

By Cartel on 21 July 2014

That’s ok buddy I use caterpiller sprays directly onto the buds nothing bad will happen. The clients can’t tell I used pesticides

By Cartel on 21 July 2014

You guys are all dumb, I use a 400 watt hps , I yield anywhere from 8-12 ounces easily , veg for 6 weeks with 8 plants and you will have a pound in 4 months+drying+curing

By Anthony on 14 August 2014

To all the brave men who went into Gaza to all who fell.

By Dan on 4 September 2014

I get 5 ounces or more on each of my plants I grow 16 in an iws flood and drain system under 4 X 600w lights in a tent that’s 2m X 2m X 3m. Veg for 8 weeks flower for 1 week. I haven’t tried the monster croping yet I might give it a go to increase my yield but my physco plants are quite bushy anyway.

By kaligrows on 22 October 2014

Light spacing….genetics and lumens=great yields!

By chrissy on 1 January 2015

Hey Robert! Reading your emails daily now for months and I’ve been growing for a yr now _

By chrissy on 1 January 2015

Wow so comment didn’t work. 150 watt in a closet measuring 32 long 25 deep 60 high is this going to give me more then a couple ounces for one critical jack herer almost 2 weeks in the switch vegged for almost 3 months trying to get more then 2 ounces..

By george on 11 January 2015

can u recommend a bloom booster Thc booster grow booster

By gary mendel on 26 January 2015

been growing for 10 years , but still not getting yield u talk about , I use 1000w and ocean soil , veg to 3 ft tall 10 plants per light, yield is only 3/4 pound, not sure what is wrong but article did not offer much info on conditions in room and genetics

By Robert Bergman on 27 January 2015

Hi Gary,

With a 1000 watt light bulb you should be able to yield 2 pounds if the conditions are right. There must be a limiting factor. Is there enough CO2 in the air? Enough water and nutrients? What are the pH and TDS levels of the water? And what are the temperatures during the day and during the night? Maybe you can open a thread on the support page and tell us some more about your setup?


By Jason Mack on 8 December 2016

strain maybe

By Chaos on 11 February 2015

How much can I expect from white widow if I have a 250w Hps and two 125 Cfl light on the sides of the plant?

By Chaos on 11 February 2015

sorry *plants, growing 4 that is

By Indica Bob on 26 February 2015

I’m growing 4 plants that I will germinate under a 125 att cfl and transfer outside in 3 weeks. At week 8 ill transplant into 45 gallon buckets. They will be under constant direct light and the will get the proper amount of nutrients.

By Jared on 5 March 2015

I know CFLs are good for vegetative growth. And I keep hearing about MH and hps bulbs. But I’m looking into a fully assembled grow box for stealth and they have CFLs and LED lights. But I don’t see LEDs mentioned in anything else I’ve read. So any info on growing with those?

By ken on 17 March 2015

led’s save power and have a very low heat output and you can grow some good smoke under them it just takes longer with them so in my grow i have a mix of m h lights and led ‘s and have great plants {50/50 each type} and it cut power use and heat output,my room with all led’s when finished is going to mixed lights

By Ocea Rice on 28 August 2016

Why? LED is beyond capable to produce quality mj plant from seed to harvest, sovwhy the B’s concerning; LEDs!? Your answer please… And doesn’t need 2include; I, or a business sooner, or buddy sell MH, SPL as your rational for propagation of ‘your’,choice of commercial market technique, you know FACTUALLY… most areb ‘small’ independent growers for their supply, period… why the Allegiance to the money whores?

By Dankmike on 23 March 2015

all of yall are lucky u are growing i have yet to even find a secret place to grow outdoors or indoors i am have 5 years in growing. my first indoor grow was a White Widow plant would like to order some of your special deals in seeds robert will let u know when i order

By rick on 14 May 2015

looking for a good seed source

By Jennifer ILGM on 18 May 2015

Great you are at the right place, just go to our shop!!

By Ridecosnow on 24 June 2015

My first indoor grow I harvested a lil over an lb on 6 plants, for second run I used clones from exact same plants, but bought a water tester and was testing at over 800ppm! I spent $80 on a water filter that brought my ppm down to 14! My second grow yielded over 3 lbs dried just from giving them clean water. Also many things in hard water are also in your nutrients, and fertilizers, so in my case they were getting too much. Working on my first OD grow right now, started from seed, and build my own soil, trying different placement of plants, 4 in the ground but u dug out a 4’x4’x4′ whole for each plant and replaced it with my own soil. They look really good, just not growing as high as I’d expected. I put them in the ground about 6 weeks ago after they’re root ball was strong enough I felt for them to be left outside. They’re about 18″ tall after 6 weeks in the ground, is that normal? I might be over watering them, the soil that I didn’t replace is very full of clay, and drainage I’m worried about. I’m in CO, so we have high heat, and low humidity, too, how often should I be watering, and how much water for that size of hole? Great site, and great tips! Thanks!

By latewood on 24 June 2015

Sometimes plants do not grow as tall under intense light. Buds get tighter though. Clay is generally full of nutrients and drains fairly well. You should be OK. Please join our support forum if you want faster responses, and more opinions from our expert growers.


By Greg on 19 August 2015

Have you used LED lights? What is your opinion on them, besides cost.

By kbk420 on 20 August 2015

My grow space is 25” deep 88” wide 65” tall. Im getting 4 300 watt led grow lights. Completely white, great for reflection however I can not decide if I should grow five plants and train them or grow several smaller plants. I don’t want any of the light wasted so which is the better option Robert?

By latewood on 21 August 2015

Hello Greg,
My opinion on LED lamps is: I do not use them. I use digital ballasts. I know growers i respect who love LED lamps and claim they grow just as much yield as HID lamps. I am not sold on this, without having done a side by side. If you join our support forum, you will run into some expert growers who can give you more insight. 🙂

By latewood on 21 August 2015

Hey kbk420,

Sorry my friend. This is a choice you have to make. It is a concerted opinion of most old school growers, that no matter what method you use, the yield will be close to the same, unless you really mess up one method more than the other.

Best advice I can give you is to; Review the type strain you plant to grow. A “Sativa” may be better of being trained due to vigor and potential height; While an Indica, or Auto flower can be grown straight up, because generally, they grow shorter. Once you understand the potential grow characterisitcs of the genetics you are going to use; You will be closer to finding the answer to your question. Happy Growing 🙂

By Otubu on 28 August 2015

Very great post. I simply sbtumled upon your blog and wanted to say that I’ve truly loved browsing your blog posts. After all I’ll be subscribing to your rss feed and I hope you write once more soon!

By mallik on 27 September 2015

Hi rob,cheers for looking after us,I downloaded one of your book and it’s a pleasure,so keep up the good work

By 420ZSX on 14 October 2015

Don’t hyperventilate over not getting the indoor quantities mentioned here. They are top end estimates if you are an expert grower and everything goes off without a hitch. These are yields to shoot for but not get all disappointed if you don’t achieve. Just enjoy the bud you grew.

Something got lost in translation in that last section of the op. It only makes sense if you count 32oz in a pound, so cut those dry estimates in half. I guess the prices are per gram? Confusing. Overall good site, though. Keep up the good work.

By Pete on 15 November 2015

Thanks for the heads-up on the maths. I like maths, but I forget to do them sometimes. That should be especially enjoyable for North American brethren, who don’t say maths very intuitively.

By Dennis on 26 October 2015

Hey Robert!
Thank you for your emails…I’m gathering information to do my first grow…being on a fixed income I have to do it in steps. It is truly amazing how the marijuana helps me cut back on my pain killers I need to take to get by each day. My question today is about using LED lighting. Are they good for growing(read different thoughts from everyone. I have a grow tent that’s 9sq. ft. How much wattage will I need for the space, and how many plants should I start off with. Looking forward to not paying extreme prices, usually get real harsh commercial. It’s what I can afford since inmy area anything that is really good goes for around 20 bucks a gram. Thanks for your help!

By Pete on 15 November 2015

Your comment really made me laugh, because for some reason I couldn’t help imagining you as a seventeen year old pretending to be a senior to cover himself for self-incrimination or something.

Read at face value, though, your comment also makes sense. So double thanks.

By latewood.ILGM on 29 October 2015

Hey Dennis,

Robert is always glad to help.

As far as how many plants you should grow in your tent You did not mention what genetics you planned on growing. If I get your dimensions correct you have a 3’x3′ tent. I would go with no more than 4-6 for your 1st grow. It is better to have a little airy space and healthy plants, than it is to cram too many plants in a small space, causing environmental issues. As you become more experienced; You will be able to add more plants and incease your yields.

I am on a fixed income. I know what it takes to put together a quality grow system on a small budget. For that reason, I recommend that you buy a 400/600 watt Ipower switchable digital ballast. LED is expensive, and the digital HID lamp is more versatile and provides more bang for the buck.

It would be great if you joined our Support Forum. Look me up when you get there. Happy Groweing

By Leon on 3 November 2015

Thank you

By Pete on 5 November 2015

Does anybody have experience with using a “Earth Box” for their grow?

By latewood.ILGM on 9 November 2015


I have not used the Earth Box. However; If you sign up to our Support forum, I am sure you will find many members with experience with that product.

By Nelz on 28 November 2015

Nice video. Very informative. Ive been growing legal medicine for the last seven years. I recently was forced to switch to a 10x10x8 grow tent. Im currently running 3000 watt hps lamps with three plants per lamp that were veged for 5 weeks. Do you think 3000 watts is overkill?


By Nelz on 28 November 2015

I actually have a fourth 1000 watt lamp in the room, just haven’t fired it up yet.

By latewood.ILGM on 30 November 2015

Not at all. I have to assume you are using 3 – 1000 watt lamps. Max. coverage for those lamps in general are 6’x8′, but overlapping the footprint would give you better results; As long as you can control the temperature.

By latewood.ILGM on 30 November 2015

Nelson. I do not see a reason to add a 4th, but if you fell the need, go for it.

By greg on 17 December 2015

I am new to this and plan to plant my first crop I have been reading a lot of information on growing and I have 1question be for I start germination what is the best way to germinate for indoor growth

By latewood.ILGM on 19 December 2015

If you are growing indoors in soil; Use a jiffey pellet to propagate your seed

If you are setting up a hydro system, then use 1.5″ rockwool cube.

By EDOG on 19 December 2015

Generally, 0.5 grams per watt is more realistic. Also, you get a better ratio of yield/wattage as you go up in wattage, i.e. you’re more likely to hit 1 gram per watt under a 600W or 1000W HPS than a 250W or 400W. That’s because HPS lights are more efficient at higher wattage outputs.

As for the outdoor stuff, medical growers in California that are limited to 25 plants are often pulling 6, and sometimes up to 8 pounds dry… from a single plant! Of course, this involves expert plant training, gardening, not to mention the near perfect conditions that the Californian coast provides.

By JAH on 6 March 2016

In regards to outdoor potted plants,

If you plant in 1 yard of good quality soil, get them vegging early inside before planting outside and then keep on top of nutrient input and overall health and training, with plenty of sunlight, you can expect to get between 2-4 lbs per plant, depending on strain. If 2 yards, double that. Ive seen 10 lb plants if all the conditions are just right.

By devon on 11 March 2016

Hi i am a first time grower, i have a 3×5 grow box that i made… I also have a 250w CFL, i plan on growing 3 or 4 plants….. My question is do i have good lighting for a great harvest?
Desperately in need of help

By Mike on 9 April 2016

I have a 60×60×80 size grow tent. 1 300 watt led light 1 45 watt led light and a 400 watt hps light. With 5 plants out of 6 remaining after take the male out.i am a first time grower nd im still not sure how to scrog yet ive seen plenty of videos I have 1 plant thats almost 4ft tall and its about 10inches away from the hps lamp while the others are about 2ft away from all the other lights how far should the tall plant b away from the light during the flower stage I am now 2 weeks into it and they should stop growing now right?

By latewood.ILGM on 12 April 2016


Different strains grow at different intervals. There is no perfect formula.

You will need to keep lamps 24-36″ from canopy depending on how hot the air space between the lamp and canopy is.

Best to think about training your plants.

Best thing for you would be to join our support forum. Many growers have become experts at SCROG, and are will to guide you. 🙂

By latewood.ILGM on 12 April 2016


You will do OK with a 250w CFL. It is a bit under powered but, will allow you to grow successfully without heat issues.

If you want a bigger harvest; You will need to invest in more lighting, and exhaust systems to manage to heat and humidity. 🙂 lw

By Marilu Femat on 19 April 2016

I’m planning on buying the set to grow along with seeds and I read that you can get more from one plant than you can with 4. Which would you recommend?

By Chris on 20 January 2017

I have yet started my grow,but I have a question. I built a 24×24×36tall grow box made of wood. How many plants can I put in there using a 250 watt HPS bulb

By latewood_ILGM on 23 January 2017

chris. Only one plant would fit in that box and you would have to do a SCROG grow to make it work/. 36″ minus a pot, and a lamp barely leaves enough space to veg 1 plant for a month; Much less attempting an entire grow or a grow with multiple plant A 24″ x 24″ box would be great for seed starting and rooting clones. 🙂

Happy growing!

By latewood.ILGM on 21 April 2016


growing is a series of personal choices. This is one of them. It all depends on how much space you have. It also depends on your grow experience; The quality of environment you produce for your plants, and many other variables.

Perhaps you would like to join the ILGM supprt forum, where we have many knowledgeable members and staff to help you all the way through your grow 🙂

Happy growing

By rj on 5 May 2016

What about led lights. Any thoughts?

By stephen on 9 June 2016

I’m a first time buyer and grower,so much great info here, I’m filling up a small note book. Just ordered Fem. white widow and plan to grow out doors upstate N.Y. wont even be able to plant until late June so this should be interesting for grow to harvest time , I”ll have about a 10-12 week window if my seeds arrive as scheduled.
My question is that if I don’t use all my seeds ( I only plan on planting 3-5 plants) how do I store seeds for next year

By fishhead on 29 July 2016

Im limited on my hieth for my light & can only grow (space enough for 2 plants). my question is how can I make it work with a 3x3x4 or 5?? reduce the 600 watt to 250 & try to bush them instead of growing tall?? thanx ..

By latewood.ILGM on 1 August 2016


Place them in a cool dark place or in the door of you “fridge” behind the salad dressing. 🙂

By latewood.ILGM on 1 August 2016


You need to read up on LST or SCROG method of growing. Download and read our Free Grow Bible. Or; Join oursupprt forum. 🙂

By tharealcoasta on 10 September 2016

Hey i downloaded the bible & plant care guide, but just curious on what the support forum is and how to join, thanks

By Roy ILGM on 12 September 2016

Growers experienced and new come together to learn from eachother as well as from our expert grower. You can have a look around here and sign up with the top-right button.

By Juana on 16 September 2016

Im scared to buy seeds -_- how can i trust you sir?

By Roy ILGM on 16 September 2016

Hi Juana, we guarantee shipping and germination as you can read here. And you can read what other people are saying about our customer service over here. Hope to see you soon! 😀

By Jason Mack on 8 December 2016

they trustworthy, fast and have great genes

By Troy Roach on 10 November 2016

Are the led grow lights worth using? Just starting my grow operation though they might use less electricity. Heard they were very good but not sure this person knows what he’s talking about. Thanks

By Roy ILGM on 11 November 2016

Hi Troy, from what we’ve seen they may yield a little bit less than HPS but it’s almost negligible when grown right.

By Mark on 20 November 2016

Just set up my grow room with a 1.5m2 x 2.4m2 x 1.8m2 tent, it’s got 2 600w hps lights, an outside air source located at the bottom left hand side and a 147mm extraction vent fitted with a 24omm x600mm carbon filter. It’s temperature and humidity controlled with 8 kush plants. My first grow but I’ve got plenty of help from experienced growers plus I used to grow show tomatoes. What do you think my yield should be roughly ?
Thank you in advance.

By Schöneny on 4 December 2016

I plan on growing with leds for the next time can you refer a cost effective one and if you have one kind goind and getting ready to flower is it unwise to add more light of a different kind? Or does it hinder growth….

By Mark on 20 November 2016

Should of said also that I’m going to lollipop them and supercrop them as well as top them, they are on a 18hr light sequence at the moment then switching them to 12/12 hr.

By latewood.ILGM on 22 November 2016


Yield is not predictable unless you have an established benchmark that would be needed to make an informed guess. Otherwise; It is just a guess.

The yield depends on the skill of the grower, and the methods, time, and investment put in to provide an optimum result 🙂

Happy growing, And; You won’t know until you grow!

By JMBG on 27 November 2016

What about the LED Full spectrum reflector?

By Mark rigg on 30 November 2016

I think I have over feed my and I am struggling to get them back will they come back or not can you tell me please

By Lou on 28 December 2016

Hi, is there any info on growing your seeds with a Miracle-Gro AeroGarden unit??

By Roy ILGM on 29 December 2016

Hi Lou, not on the blog but you may find someone on te forum with experience with the unit

By latewood_ILGM on 16 January 2017


An aero garden is not big enough to grow big marijuana plants to finish. I believe this unit was meant for growing herbs on you kitchen counter. Why don’t you join us at We have an excellent support forum. Peace, lw

By Todd McCurry on 7 July 2017

I use one to start my seeds and it works end up with some very strong roots to start your plants with

By Drew on 16 January 2017

My question is about yield. When you say “an average of around 5.0 to 10 oz (21 for advanced growers) with a 600-watt HPS lamp in a grow room that measures 4 x 4 x 8 ft.” is that at harvest or dried?

By leventis on 16 January 2017

Thats a good question.. I wanted to make this question but my friend here did it already…If anyone can please help us out.. what they mean with auto seeds when they say you will get 500g/m2 (they mean DRY OR WET?) if its wet then this is no possible coz you will get 25% of your wet bud ..that mean in 1m2 u will get 125g of dried bud? or when they said 1 wat per g they mean wet or drie?

By latewood_ILGM on 16 January 2017


Usually when someone tells you they yielded
amount; It means dry

By Drew on 17 January 2017

Thank you, latewood_ILGM, for the quick reply.

By Leventis on 16 January 2017

i need also a little help if anyone can do it…i am new to practice growing.. i have been reading for more than 5 years but i didn’t had the chance to fulfill my dream until now.. anyway , i Have a room of 2x2x2M , 2400W led , 16 pot of 21L each Hydroponic RDWC system good ventilation system and environment( i know that this is a very good kit for photosynthesis grow “normal plants not autos”)but i dont have more than 4 month from seed to harvest).. i want to grow autos for fast harvest less than 13 weeks (from seed to harvest)exept if there is other way..i have redden some article that take me to a conclusion about the strain i need(amnesia haze autos) i am not sure yet and that is why i need your help…
My goal is to get 2kg of dried bud if possible in 3 and half month + 14 days dry =4 month total from start to finish..
If anyone can help me out to reach my goal please …all its left is What strain , nutt schedule , what i have to do to reach my goal?Any help will be appreciated !
Thanks Regards Leventis…

By Roy ILGM on 17 January 2017

Hi Leventis, the blog isn’t really set up to answer these types of questions but if you hop onto our support forum our experts can help you out there.

By latewood_ILGM on 16 January 2017


I find that most autos take 110 days minimum to finish properly. I suggest that you join our support forum where we can all discuss your plans and give you sound advice. When you join, post an @latewood so I will know you are there. We can help.

By latewood_ILGM on 16 January 2017

Autos generally take 110-120 days to finish in my experience. I harvest by monitoring trichomes for potency. I suggest you join our support forum and we can help you bring your plan to life. Just @latewood when you get there, and we will get started.

By John lamb on 22 January 2017

But ain’t the most determining factor is the strain your growing. Some strains just don’t produce as much as others do they ?

By Frank Cassianna on 27 January 2017

Thank you Robert, I owe my education to you…. This is the best site on the subject on the planet, I enjoy your articles and for free or a few bucks one can develop a serviceable skill. I got to go to your store and buy some more seeds and stuff …. Thanks again from the other side of the planet.

By Roy ILGM on 27 January 2017

Good to hear Robert’s information is helping you Frank! Happy Growing!

By Daniel on 27 January 2017

Hey guys.
Just wondering a little more info on grow lights and room sizes.
I am currently using a tent that is 800mm x 800mm x 1600mm with a 250w hps and mh globes for flower and veg. My question is roughly what can i expect to achive being a beginner and in comparison a advanced grower.
Thanks again for the help as always

By latewood_ILGM on 31 January 2017


It is posted in the article above that the approx. range of yield for a 250w hps grow is 80-150 grams. The size of tent and plant count is moot.

We shoot for a gram per watt. Most growers are lucky and happy to acheive 1/2 gram per watt.

Happy growing.

By David Rhamey on 27 January 2017

I grow indoors using a combination of LED and CFL lights. My 5′ x 5′ grow tent is lit with 2 165 watt led lights, a 250 watt CFL and a 125 watt cfl. I don’t really know what I get per plant. I do know I get way over 1 gram per watt. Each variety and harvest are a little different, hell each plant seems to have a personality. Oh, I also use “smart” pots, no root bound plants and I use a very old and very basic nutrient brand. Also my dried bud weighs a minimum of 25% of harvest weight, usually closer to a third. Happy growing

By Mike on 11 February 2017

Hi new here. I have always growing outside so new to indoor growing. My plan is to start indoors and move to outdoors with clones. Have a tent 27x27x63 inches with a mars 300.Is that enough light? Using soil I made. Compost and Miracle gro. Going to finish off some plants indoors. Any help would be nice.Happy growing all.

By latewood_ILGM on 14 February 2017


That is a small tent, and it will work for veggin clones.

As far as mixing compost or manure with Miracle Grow; That soil might be too HOT. Be careful.

By mike good on 25 February 2017

Great article, especially for the newbies you are teaching, Robert. Advice like this will keep them from making all the mistakes most of us made starting out. You are really giving a lot of value with your free lessons. Wish this info was available when I started in the 60’s.

By Roy ILGM on 27 February 2017

Thanks Mike, I’m glad we’re helping out!

By Dan Steen on 16 March 2017

Actually more of a question. Before I found you and your site I bought a Sun System DIamond 315 watt LEC light for my 3×3 tent. I am brand new to the hobby but I am doing it because I am retired and I have the time to do Hydro plus I love watching things grow. So is this light (like you said LED) inefficient compared to HPS ?
Now my next question and I feel stupid even asking this but I don’t understand this theory. It seems if the electricity costs you $1000. each plant would cost more than $50 to produce.
Growing 5 marijuana plants in a 2×2 foot grow tent with 2x100watt CFL will cost you around $1000 per year and yield 0.25 pound of marijuana per harvest. With 4 harvests per year, each marijuana plant costs about $50.

By Daniel on 17 March 2017

I asked about LEC not LED

By latewood_ILGM on 17 March 2017


Although LED lamps systems have made great strides. Many expert growers still consider HID lamp systems superior. The cost per watt is vastly different. LED lamps matched in watts are approx 5 times as expensive.

As far as the example you posted. Depending on where you live; Electricity costs vary. IN relation to the cost of $50.00 per plant example; One Gold Leaf grown under a 600 watt Digital lamp system will yield 6 oz. per plant in just a simple 5g cloth pot. That has a medicinal value of 1500-1800 bucks per plant. Sounds like it would be worth it to balance $50 bucks against the massive savings from buying Meds at a pharmacy.

Perhaps you should join our support forum. We have many helpful friendly, and sharing members who can share their experiences with you.


By Kb on 22 March 2017

I have had good results with household led bulbs in a small grow cabinet. My box measures has 3.25sq ft of floor space (18x26inches) and 60 inches of height. I have yeilded over 5oz with 2 plants in deep water culture using 12 Philips soft white led 100w equivalent bulbs. They use a total of 175w.

By latewood_ILGM on 28 March 2017

Hey Kb,

Great stuff. Thanks for sharing.

By RSB on 28 April 2017

Hey Rob
first time grower. Got autoflowers in February and by April they are blooming. I germinated & grew them indoors under 24 hour light, in Miracle grow Garden soil. When I replanted them I added used Coffee & Tea leaves, Sand (for drainage), crushed eggshells to Miracle Grow Garden soil. A few weeks later the 2 foot plants flowered. I quickly put them in larger pots with the same formula (dried coffee/ tea leaves, crushed eggshells, sand with Miracle grow garden soil and this time some potting soil as well). and shifted to 12/12 sunlight and complete darkness. Soon I moved them outdoors (live in the deep south) where there is plenty of sun, warm weather. If it is going to rain i put them under the glass table outside. If not they sit on top. Only water the soil and stopped spraying the plant. Gave the prescribed dose of “Blooom all” and the flowers are now over an inch and rather thick… on a couple of plants while they vary in size on the remaining ones. I clipped a couple of flowers, oven dried them at 200 degrees for 20 minutes. they are great. I check the others with lens used by geologists and the ‘dew drops’ on the flowers is clear but profuse. the Pistules have turned red and crumpled up but i am waiting for the ‘dew drops’ to turn a shade of yellow to amber before I clip them this time using a dark .
Now they simply sit out under natural day and night light. I water them making sure the soil stays fully moist.
closet to dry them. Few questions:
If I re – pot them to larger 2 gallon pots while they are flowering will they grow as a plant and continue to flower? Right now they remain at 3 feet in pots less than 1 gallon.
My first “harvest” of 3 flowers was on April 24, today it is the 28th. Should I wait till the ‘dew drops’ turn a yellow shade before harvesting the next bouquet of flowers?
-I guess I could get 2 to 3 bouquets till October. Would my guess be right?
-Any tips or advice for me?

By Roy ILGM on 1 May 2017

Hey RSB, that’s some great work! Best hop onto our support forum. Our experts there are able to answer all these questions and more! – I❤️GM

By King on 17 May 2017

How many seeds should be placed in each container? For example one seed per bucket or two seeds per bucket and so on?

By Roy ILGM on 17 May 2017

Hey King, place one seed in each container, that way the roots stay out of eachother’s way. – I❤️GM

By Elaine on 5 June 2017

I have 4 plants (2 different strains) in my 4×4 tent. I grow hydroponically. All plants are in a 20 gallon cooler. I have a water chiller keeping the water at a constant 70 degrees. I have a Mars II 1200w LED lamp with both lights on (veg and bloom lights) for the 12/12 light cycle. And to complete the puzzle, I have an o2 Grow oxygen emitter (with 2 emitters). Harvest will be in 3 weeks. I am on track for at least a pound. This is my first grow with all the right equipment. I had one hiccup with one of my timers. The plants did not have any oxygen for about a week until I discovered it. But it only affected one section of one plant. No big deal. I’ll be happy with this grow. I learn something from every grow. Next grow will be the perfect one!

By Money85 on 5 June 2017

Hello elaine. Do you have experience with soil? Could u maybe help me out with my grow quick?

By Elaine on 6 June 2017

I’ve never grown in soil. Hydroponics is the way for me. I get bigger yields with water rather than dirt. What seems to be your problem?

By Money85 on 5 June 2017

Hello all, can someone please help me out with my grow? Advise, anything?

By Elaine on 10 June 2017

Hello Money85. I could give you some advice but I don’t know what you want to know. I’ve been growing hydroponically for two years and I’ve had a few hiccups along
the way. But I do learn from my mistakes and hope to not make the same one twice. Give me some questions and I’ll try to help you.

By Johnniebeebad on 7 July 2017

I am a first-time grower in soil in pots outside my plants get sun from the morning from about 8 a.m. till 3 p.m. and then get little spurts through a tree after that… 4 of my plants are going very nicely but to seem to be struggling in size they look very healthy but they are just not keeping up with the others do you think they will catch up eventually

By Edward Baumbach on 7 July 2017

I am having problems with getting my plants to get beyond the sprouting stag
The germinated seeds grow to small plants with two to four leaves on top and then just die. I folowe the grow bible but the pants still die. Can’t figure it out..

By Roy ILGM on 7 July 2017

Hi Edward, best hop onto the support forum and explain the steps you take in detail. Our expert growers there can analyse your case and will help you improve the process 😀

By Johnniebeebad on 7 July 2017

I am a first-time grower outside in pots in soil I have five different strains co
Kushage. Cinderella 99. grape Escape. sweet tooth. and Bubba Kush. Are these good strains to grow outside

By latewood.ILGM on 11 July 2017


I have to smile. Imagine an old grower wanting to help you learn the things you need to know in order to grow successfully. I am smiling. Do you wan to know why?

You are already outdoors and you are now needing to figure out how to nurture your plants until and through harvest. So; The question is not how your plants will do; It is: “How do I get to a successful harvest, now that I have started these plants outdoors”?

Join us at

We will guide you to a successful grow. 🙂

By BlueStu on 7 July 2017

Ive just finished a Hydro Ebb and flow grow with one Royal Critical Auto Autoflowering plant. I used a 400W Led Two COB lamp. The final dry yield was 130 Gram(4 1/3 Oz). Not too shabby for a first time grower using home made hydro gear. The lamp was purchased on eb*y for about £90 (Uk Sterling). THe wuestion on everyones mind….what was the product like. Very nice….very nice indeed. It stands up to and probably beats anything local dealers in my area sell so the experiment was a complete success!!

By Roy ILGM on 10 July 2017

Awesome story BlueStu! I know people on the grow forum love these kinds of stories, maybe you can create a grow journal one day 😀

By latewood_ILGM on 11 July 2017

COB LED is the way to go. 4 oz from an
auto” is excellent. Great job! 🙂

By Roy ILGM on 20 July 2017

Hi James, nice platform you’re building with CAN! You can syndicate the article but pls give proper credit to Robert Bergman including link back to the original content.

By Jim Bates on 15 September 2017

Thanx Robert this is the most awesome free growing website That I’ve ever seen I suggest it to all first time growers. Listen I’ve been doing this for 15 years and still downloaded this free growers bible E-book I love the in-depth love that is shared yes I call ed the info love because the founder of this awesome “GEM” of a book shows his love for getting newbies comfortable with how easy it is if you reSlly have the gift of the canbabis Green Thumb “Peace Love & all that good stuff I’m out
Jim Bates here have a wonderfully Blessed first grow.!!!!!!!!!!!

By ChrisDawg on 1 October 2017

I’ve been killing it with LED lights! It’s the way to go!!!! The problem is all LED lights aren’t created equal. The ones that work have red only for flower and blue spectrum only for flower;dont use mixed spectrum. Think about my growing friends the colors red and blue make what color…green. When the red and blue start mixing a few inches down from the light as the par spreads you’re soaking your plants with green light with fragments of red white and blue spectrums screwing your yields. Led is way better than HPS, I’m yielding over a pound per plant,better quality, and cheaper electric bill.

By ChrisDawg on 1 October 2017

***Correction: RED LIGHTS FOR VEG AND BLUE FOR FLOWER. Happy growing!

By ChrisDawg on 1 October 2017

Ok, so I’m retarded. I reread my post and obviously red and blue doesn’t make green but the red,white,and blue lights mix the spectrum so you do get green light from it. The specs mix all the way down the par and it gives you a bad spectrum and those lights can be very pricey. Get a red LED for veg and a blue for flower and see the difference. I’m sure you guys can tell how potent my weed I when I have to repost 3 damn times to just get you the info. Happy growing!!

By Dave on 8 October 2017

Red and Blue make Purple. The only Green is your plant. Not to mention that Blue is more vegitation, and Red is for your flowers. Your success is a miracle.

By latewood_ILGM on 10 November 2017

ChrisDawg and Dave,

Full spectrum lights are the best spectrum and being proven everyday. Yes Blue MH HID is generally used for Veg and Red HPS HID in flower. HOwever; Higher terpine levels, and THC% Using Metal Halide or Full Spetrum white light (LED)

There is hardly ever any green in the lamp spectrum. And Blue and Yellow produce green

Happy go lucky growing 🙂

By tom on 13 October 2017

hi this is the first time i have ever been here i have searched other sites but this one has already taught me alot i have grown out doors twice first time they had buded but got blown over so i took them in second ttime still paid no atension but did put some manuior down about half way through the season going to spend some time on them next year

By latewood_ILGM on 10 November 2017

Hey Tom,

You can get some excellent guidance; Here:

By Newfie on 8 November 2017

Is it possible to do a large Scrog, out doors, using natural light.
Seems it would be fun to try.
Wonderful website.
Thank you

By latewood_ILGM on 10 November 2017


Of course you can. Although most growers do not find it necessary due to having unlimited light; You could SCROG outdoors if you want to build it and work it. 🙂

By Geoff on 28 November 2017

I reckon the “scrog” method is great outdoors, since it’s possible (and desirable) to keep the growth with as low a profile as possible. One plant with the branches pinned down as they grow is a lot safer than simply allowing it grow tall enough for people to see over your fence.

By latewood_ILGM on 11 January 2018

SCROG is great technique Indoors or Outdoors.

Most indoor growers using grow tents use SCROG for their grows. It is definitely not an outfoor only method. Peace

By Anthony Murray on 2 January 2018

Gday Robert,
I’m planning my first crop but just plan to stick a few plants in pots in my lounge room without getting a setup, is this a good idea?

By latewood_ILGM on 11 January 2018


What do you mean; Without getting a set up?

If you put nothing into your grow, then you can expect as much return. Temper your yirld unless you plan on doing it right. God luck 🙂 Perhaps you should go and join our support forum. We can help you grow successfully without doubting yourself along the way. See us here:

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