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Indoor Marijuana Growing Systems

Indoor Marijuana Growing Systems

One of the first decisions to make, once you have decided to grow your own marijuana, is whether you will grow outdoors or indoors.

Preparing to grow indoors has its unique challenges and benefits that you must know if you want to end up with the best stash of weed.

This short guide article will discuss some of the basic information you should have before setting up your indoor growing systems.

Growing indoors

There are a lot of different reasons for growers not to cultivate plants outdoors, from climate and weather to legal reasons and decreased yield. Even if a grower is fortunate enough to have the law on his side, it’s always possible that some bad apple will try to steal the plants. Easier than growing your own, right?

Throughout history, farmers have always had to worry about theft, and cannabis buds attract far more resourceful and focused predators than potatoes or carrots ever have.

Growing indoor marijuana

Indoor marijuana grower

Fortunately, growing your plants indoors offers protection against all of these hazards. No need to worry about thieves or weather or any sort of other predators. You control the environment.

Every facet of the plant’s growth can be carefully monitored and adjusted to create the perfect environment for your plants. There are several variations available for indoor growers. Hybrid systems can offer plants both natural and artificial nutrients and light. Greenhouses fall under this category, for example.

Hybrid systems

Hybrid systems can range drastically in complexity, from the relatively high-upkeep of an artificially heated greenhouse to the simple placement of a couple pots in front of a window. The primary advantage to any of these hybrid systems is that they can use real sunlight.

Hybrid systems cannabis growing

Hybrid system for cannabis growing

Many growers swear that natural sunlight is the best source for plants, even if it’s being filtered through glass. This makes sense since most bulbs used for artificial light simply don’t offer the same spectrum as the sun.

Additionally, tall windows in a small apartment can actually be close to ideal. If the windows reach down to the floor, the plant itself can be placed on the ground.

Tip: make sure to download my free Grow Bible for more information about growing indoor

This is better than raising it up since it will be able to absorb additional carbon dioxide, which sinks down to the ground after being exhaled by humans. Read more about marijuana grow rooms

Closed systems

While growing in front of a window is the simplest route, it’s not always an option for growers. Not every living space is equipped with tall windows, and even those that aren’t always a good choice.

In many parts of the world, it’s undesirable to put the cannabis plant on display. In order to receive light from outside, a grower has to make it possible for strangers to look in and see the plant itself.

In addition to the total control offered by closed systems, growers can also benefit from the privacy. Although it can be a bit more work, it allows to the grower to maximize the potential yield of the plant by optimizing the environment.

Closed systems cannabis growing

Closed system for growing

For these reasons, many growers prefer to use fully enclosed systems. This is especially true for larger scale or professional operations since it has the potential to be so efficient and offer higher yields.

Closed systems also allow growers to actually mutate their plants to achieve specific effects. The potency of cannabis grown indoors can be truly exceptional, with much higher ratios of the cannabinoids and other active ingredients so prized by growers and consumers.

The fully enclosed systems allow growers to saturate plants with optimum nutrients, but it also allows growing seasons to extend indefinitely. The length and cycles of daylight can be radically altered, essentially “hacking” plants so that enormous yields can be achieved. Read the article How To Build A Marijuana Grow Room

Grow room procedure

Although it can be more complicated than growing outdoors, an indoor grow room is simpler in some respects as well. Set up properly, an indoor grow room offers everything a grower needs to successfully raise a plant from seed to sprout and beyond.

Soil, fertilizer, and water are all added at regular intervals. Following instructions on how to care for plants inside will allow growers to get great yields.

Cannabis grow room procedure

Grow room

Generally, plants should receive light in regular cycles of light and darkness. Twenty hours of light exposure followed by four hours of darkness is a good rule for growers to follow, with the temperature in the environment being kept at around 70 degrees.

Once the plants have reached the desired size, the light cycle can be adjusted to alternating cycles of twelve hours light to twelve hours of darkness. The increased darkness will cause cannabis to flower, tricking the plants into thinking that the seasons are changing.

Regardless of the type of system used, it’s important to remember that the genetics of the seeds used will figure prominently in the quality of the end product. Bad genes can’t grow top quality cannabis, even if conditions

Thanks for reading. Please leave comments or questions below and don’t forget to download my free grow bible


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Comment Section

22 thoughts on “Indoor Marijuana Growing Systems

By Anthony on 13 March 2014

What do you mean by plucking the leaves to stimulate THC growth?
I must of missed that part.

By Xua Yang on 21 June 2014

What happen when my plants are budding but than starts to veg again? It is the temp or what happen? Any suggestions? Please help!!

By Sandra on 25 May 2015

I here ther’s a site that helps people find a marijuana doctor, I think it was called maybe you could pass this on. Just thought it might help someone.

By Jennifer ILGM on 26 May 2015

Thanks for sharing!!

By EHall on 2 June 2015

I am doing my research into a grow box.Articles I have read states you need at least a 400 watt bulb for growing. the grow box I am looking at only has 60 wtts. Will my plants grow normally? Thank you. E

By latewood on 3 June 2015

Yes; Your plants will grow naturally. More powerful lamps cause more heat, and this might be too much for your grow box. You did not suppl us with dimensions or heat indexes. If you do a grow and find that it was not as bountiful as you had hoped’ You can re-think your plan the next time around.

By TBones on 31 December 2015

So far I like what I’m reading and I’ve read more then my share of books, articles and web sites looking for a writer who I first understand and second is an easy read. Now is where I give a clue to my age and when I first started growing Marijuana, the record album “A Child’s Garden Of Grass” had been release for 2 years. I highly recommend reading the book first and then listen to the record album(digital). I’m not an expert by any stretch of the word I’ve dabbled. It’s been the past 3 years that I’ve been getting serious about growing my own and maybe in time for others. I was looking at amazon for small grow boxes and the cost can be overwhelming. A small grow box can easily cost $350 to $1200.00 and if you’re reading this I know you’ve been looking at boxes, grow tents and green houses. Although with the right knowledge about the heat a bulb generates is an important factor, not only for the health of the plant it also helpful when picking a socket to put the bulb in. I’m building my own box from scratch which will cost at present give or take $150.00. I’ll report back in a few weeks to update you on the progress.

By RUSSELL on 3 March 2016

How much water does a flowering plant need

By latewood.ILGM on 4 March 2016


A flowering plant needs as much water as it will uptake. It all depends on pot size, type of system, lights, environment. etc

I advise you to join our grow support forum, and also; Download and read our free grow bible.

Happy growing

By charlie on 30 November 2016

Top article again – this site is tits, thanks Robert for your exceptional guides and info (no one needs to ask a question really, its all covered, don’t be lazy and read!)

By Lee on 21 February 2017

With the Sea of Green method, would it work to do the vegetative phase under the lights 18-6 hours (for 4 weeks), take cuttings, then move them outside in a natural 12-12 hours (Hawaii) environment, then plant the trimmings and raise them 18-6 inside?

By latewood_ILGM on 22 February 2017


You definitely can veg plants for 4 true weeks and move them outside.

A Sea of Green is done with clones. You can build your SOG outdoors with your rooted clones anytime you desire. You might have fun and love our support forum. Join up, and look me up. Peace

By Sam on 28 February 2017

I got some big bud fem seeds grew in 1/3 soil 1/3 perlite and 1/3 vermiculite in pb18’s have pH tester and cf truncheon followed all your guides and I am getting on average 20 GMs dry per plant under 600 watt HP’s quantum for flowering. What’s going wrong I haven’t seen a big bud yet. Did some clones same results. Any advice also using co2 lamp in tent 1.4metres x1.4 metres. Cheers

By latewood_ILGM on 3 March 2017

Your question appears to be a bit broad ranged for a blog comment section. You need to join our support forum for extended support over several Q and A’s.

One thing that rings out to me is your medium. 1/2 soil needs to be a heavy 50% and perlite vermiculite 20+% each. What is not added or mentioned is dolomitic lime to buffer the PH.

I cannot tell what you are growing in or for sure what lamp you really have. See you in the forums.

Happy growing.

By Lou on 20 May 2017

I am growing indoors with an Aerogarden hydroponic system. My plants (white widow fem) are on a 17/7 cycle right now and are approx 6 inches tall. When should I switch the light cycle to force flowering and should it be 12/12?

By latewood.ILGM on 25 May 2017


You cannot switch to flower until the plant is at least been in veg for 1 month. Most growers Veg for 2 months for bigger yield.

IN an aerogarden, you may want to flower after 1 month to limit the size of the plants.

And, Yes; 12/12 photo period for flower cycle
Happy growing

By JGD GoB on 18 July 2017

Is it a good idea to give autoflower plants more than 12 hrs of light during flowering. Plz and thanks

By latewood.ILGM on 21 July 2017


Auto flower genetics should be grown under the same photo period from start to finish. 16-18 hours of light and 6-8 hours of dark. Never change or shorten photo period unless you want the plant to stop growing and finish.

We have many great threads of information at the ILGM support forum. Peace

By Tony BUGS davis on 3 January 2018

My first indoor grow was amassing to me white widow strand #1 for me trying to figer out my next strand durbin poison I thank send me some pointers thankstony

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