How Much Marijuana Can One Plant Produce? A Pound!

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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.

Make sure to download my free marijuana grow bible at this link for more information about growing marijuana and check out our Marijuana booster. A great product composed of the exact right mix of nutrients to help the plant thrive and double your yield.

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.

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. Beginners can expect to yield grass as follows:

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.

Check this link for the best grow lights available

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.

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

  • If you’ve only got 4 plants, your crop will be ruined if even 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.

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!

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.

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.

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

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

By Andy on 24 February 2013 at 01:29

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 at 07:47

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 at 21:55

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 ilovemarijuana on 25 February 2013 at 09:51

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 at 00:23

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 at 22:54


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 at 09:04

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 terry on 30 April 2013 at 04:58

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

By Blazer on 15 July 2013 at 16:07

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 at 04:22

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 at 09:59

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 at 15:44

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

By Leon on 10 November 2013 at 22:12

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 at 21:26

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 at 10:06

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

By ataxian on 21 January 2014 at 19:32

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 at 20:55

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 at 22:01

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

By budhunter on 22 January 2014 at 00:09

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 at 22:01

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

By Edwin Smith on 8 April 2014 at 16:23

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 at 03:32

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 at 00:09

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 at 22:00

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 at 21:58

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 at 07:37

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

By Dan on 4 September 2014 at 10:14

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 at 06:34

Light spacing….genetics and lumens=great yields!

By chrissy on 1 January 2015 at 17:18

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

By chrissy on 1 January 2015 at 17:20

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 at 02:27

can u recommend a bloom booster Thc booster grow booster

By gary mendel on 26 January 2015 at 17:56

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 at 11:44

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 Chaos on 11 February 2015 at 19:26

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 at 19:27

sorry *plants, growing 4 that is

By Indica Bob on 26 February 2015 at 20:11

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 at 05:03

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 at 05:00

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 Dankmike on 23 March 2015 at 23:24

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 at 21:21

looking for a good seed source

By Jennifer ILGM on 18 May 2015 at 09:16

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

By Ridecosnow on 24 June 2015 at 10:25

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 at 22:19

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 at 00:33

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

By kbk420 on 20 August 2015 at 00:59

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 at 18:41

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 at 18:47

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 at 01:24

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 at 15:34

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

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