Can you really grow weed in a closet?

Of course, you can! Growing weed in closet spaces isn’t anything new. In fact, there are even grow cabinets (that are smaller than closets) dedicated to growing marijuana plants.

However, most growers would rather transform existing closet spaces in their homes and turn them into their dedicated grow closets because it’s cheaper than buying a grow box.

Besides being a convenient place to grow if you don’t have enough space, growing weed in a closet also benefits privacy. Unfortunately, creating your own grow closet requires a lot of handiwork, but this guide will help.  

I’ll provide a rough outline of what you need to know when setting up your own grow closet. Including:

  • Proper ventilation
  • The type of seeds you can grow
  • Mold considerations

Transforming your closet into a cannabis grow box: A detailed guide

Best lights for growing weed in a closet

Whether you’re growing weed in closets, space buckets, or tents, consider the type of grow lights you’ll use. So far, nothing has come close to the efficiency and effectiveness of LEDs. Marijuana needs a lot of light and thrives in UVB light, which LEDs emit.

UVB light acts as a type of stress, causing marijuana to produce higher quantities of trichomes to protect her buds. And more trichomes mean higher quality buds.

setup for growing weed in a closet
Grow lights for growing weed in a closet

For more information on trichomes and how to get more of them, read how to increase trichome production. LEDs also don’t produce heat, which means you won’t have to worry about fluctuating temperatures in your grow closet.

You also don’t have to worry about electrical costs because LED grow lights don’t consume as much as fluorescent bulbs.

They will also last you way longer than any other light fixture. This is why LEDs are one of the best lights for growing weed in closet spaces. They’re expensive, sure. But the benefits and advantages are worth every penny.

Choosing a grow medium

In the same vein as choosing grow lights, you also have the option of picking your ideal growing medium. If you happen to have experience building a hydroponics system, then you can also put a small-scale version of it in your grow closet.

This allows you to grow using a reusable medium and use the exact amount of nutrients you want. With a small hydroponics system, your plants will thank you by growing at a much faster rate with bigger and possibly more potent buds.

Hydroponics system for growing marijuana
Hydroponics system

However, one problem with hydroponics setups is mold and root rot. These fungal fiends will crop up in places with moisture and high humidity, so using a hydroponics system increases the odds of harmful fungi appearing in your closet and damaging the roots of your marijuana.

Prevent this by installing a ventilation system and properly lining the walls of your closet with Mylar film. The Mylar film adds an additional layer that will keep mold out, but its primary purpose is to reflect light off the walls so that your plants have an all-around coverage of light. 

Growing marijuana in a closet is going to take some effort. Download our FREE marijuana grow bible and checkout our easy step by step guide to grow marijuana plants in your closet.

Plant size considerations

Outside of providing light and a medium to grow your marijuana, your primary concern is whether or not your closet has enough space to accommodate the setup and the strain you’re going to grow inside of it.

Growing weed in your closet will be a challenge if you go for large strains like Critical Mass when you don’t have enough vertical space. There is a workaround to this, and it’s called Screen of Green (SCROG). This method of controlling the growth of your plants places a screen above them, so they grow horizontally.

Growing marijuana in a closet
Growing cannabis in a closet

The best way to make use of grow closets is to raise autoflowering strains. This is because, unlike normal strains, autoflowering strains are much smaller – only growing up to a third of the size of a regular strain. Additionally, they grow much faster than the industry standard, which means you’ll harvest much earlier.

And if you decide to grow autoflowering strains in a small-scale hydroponics system, you would get around the issue of low yields that autoflowering strains are known for.

Best Cannabis Seeds for Your Closet Grow

super lemon haze autoflower strain
Super Lemon Haze Autoflower

Super Lemon Haze Autoflower

This sativa-dominant hybrid strain is surprisingly tall for an autoflower. It’s a bit of a challenge to grow because it reaches up to 100cm, just 50cm shy of the standard marijuana plant height.

Despite that, it stays relatively compact and easy to manage, making it perfect for your grow closet. And with a max THC content of 22%, you’ll surely enjoy this autoflower.

Plant type20% Indica 80% Sativa
THCUp to 22%
CBDInsignificant amounts
ClimateIndoors | Mediterranean | Mold Resistant 
Plant sizeTall
Grow time10 – 14 weeks
Yields4 to 6 oz per 3x3ft
Taste & SmellCitrus | Herbal | Sweet
Super Lemon Haze Auto Strain

Buy Super Lemon Haze Auto Seeds

  • 20% Indica 80% Sativa
  • High THC levels up to 22%
  • Easy to grow
  • Stimulating, energetic euphoria

White Widow CBD Autoflower Strain
White Widow CBD Autoflower

White Widow CBD Autoflower

This indica-dominant hybrid strain is rich in CBD. White Widow plants will only grow up to 50-60cm in height, and throughout their growing period, you’ll rarely run into problems. The only significant issue is during harvesting – the buds are quite sticky, so wear gloves.  

Plant type60% Indica 40% Sativa
THC6 – 9%
CBD6 – 9%
ClimateIndoors | Temperate | Mediterranean | Steppe
Plant sizeCompact
Grow time10 – 14 weeks
Yields4 to 6 oz per 3x3ft
Taste & SmellEarthy | Fruity | Lemon | Pepper | Pine | Spicy | Woody
EffectsCreative | Energetic | Euphoric | Happy | Uplifted
White Widow CBD Auto Strain

Buy White Widow CBD Auto Seeds

  • 60% Indica 40% Sativa
  • Very High CBD
  • Highly resistant to diseases
  • Long-lasting buzz

Girl scout cookies autoflower strain
Girl Scout Cookies Extreme Autoflower

Girl Scout Cookies Extreme Autoflower

Another indica dominant-hybrid strain, Girl Scout Cookies, is also available as an easy-grow autoflower.

It only reaches 76cm and offers a relatively average yield for its size. A part of why it’s so easy to grow is that the plant is resistant to mold and pests.

Plant type80% Indica 20% Sativa
THCUp to 21%
CBDInsignificant amounts
ClimateIndoors | Mediterranean
Plant sizeSmall
Grow time10 – 14 weeks
Yields4 to 6 oz per 3x3ft
Taste & SmellDiesel | Earthy | Herbal | Lemon | Pungent | Skunky | Spicy | Sweet
EffectsCreative | Euphoric | Happy | Relaxed | Uplifted
GSC auto marijuana strain

Buy Girl Scout Cookies Extreme Auto Seeds

  • 80% Indica 20% Sativa
  • High THC levels up to 21%
  • Good yields indoors and outdoors
  • Easy going relaxing high

Setting Up Ventilation

Like any indoor setup, you need to consider how to properly ventilate your grow closet. If you don’t, your closet will fill with stagnant air that’ll choke your cannabis.

Your plants will be unable to complete metabolic processes such as respiration and, more importantly, anabolic processes like photosynthesis.

Ventilation system for growing marijuana in a closet
Ventilation system for growing cannabis in a closet

Essentially, their growth will be hindered. However, the more immediate concern for you is that stagnant air will spike up the humidity in your grow closet.

This will create a breeding ground for mold and other harmful pathogens that will contaminate your cannabis.

But by having a ventilation system in place, your grow closet and your cannabis will remain sterile. Additionally, installing a fan produces a breeze that will help make the stems of your cannabis stronger.

Odor Considerations

When growing in a closet, expect to deal with plenty of skunky marijuana smells.

Thankfully, odor control and ventilation work hand-in-hand. If you correctly installed a ventilation system in your closet, you’ll be able to filter out that strong odor that marijuana plants are known for.

This is because part of what makes a good ventilation system is its carbon filter, which does most of the work when it comes to removing the odor in your closet and making sure none of it leaks out.

Growing marijuana in a closet and controlling odor
Growing cannabis in a closet and controlling odor

Though buying a carbon filter can be a bit pricey, it’s an expense worth having since it saves you from having to deal with complaints from your neighbors.

However, it’s important to know that even with a carbon filter installed in your ventilation system, it wouldn’t completely eliminate the smell in your closet.

At best, it would minimize to a manageable degree. You’ll need to take other steps as well, such as using fans and choosing a closet space that isn’t near people. 

Tending to your Plants

There’s not much difference between growing one weed plant in a closet and growing one in any other indoor setup.

You still need to put the same amount of care and attention. Routinely check the health of your cannabis. You can do this by looking at their leaves to spot any yellowing or discoloration. 

Ensure it gets enough light and doesn’t grow lanky with sparse branches.

Growing multiple marijuana plants in a closet
Growing multiple cannabis plants in a closet

To avoid giving your plants uneven amounts of light, practice pruning the tops as it tends to grow much faster than the bottom half of your cannabis.

This helps your plants receive even amounts of light, and it also has the additional benefit of making them bigger in response to the stress brought on by pruning. A bigger plant means a higher yield.

Our FREE mini Harvest Guide will help you determine the best moment to start drying and curing your marijuana crop. Download it now!

The Curing Process

Regardless if you’re growing weed for your own use or you’ve branched into the commercial side of things, you’ll run into a situation where you have buds lying around.

Now you must make sure your buds don’t spoil or become contaminated by mildew and mold. The best way to do that is curing. 

Curing is a two-step process that involves drying your buds in the open air and then drying them in a sealed environment.

Marijuana curing process step 1
Curing process step 1
Marijuana curing process step 2
Curing process step 2

The initial drying period would take you about a week. This first step is necessary regardless of whether you want to make your buds last longer because you need to dry your weed before consuming it.

It’s only after you dry them that they become smokable. For the second step, the curing part, place your dried buds into mason jars, keeping them in a humid place with a room temperature of 70°F (21°C).

This second step would take you around 2-4 weeks or up to 3 months, depending on how long you want to cure your buds. The curing process has many benefits.

Outside of prolonging your buds and keeping them clean for smoking, curing your buds also brings out more of their flavor and produces a better high.

Storing Your Marijuana Buds

With your buds cured, the only thing that remains is to store them. If your plan is only to keep your buds for a couple of months, the mason jar you cured them in will be enough. To store them, simply move the jars to a cool and dim environment.

Storing weed in glass jars
Storing weed

However, if you want to store your buds for longer than six months, you’ll have to pack your buds tightly in mason jars and store them in a freezer. Or you can vacuum seal them.

Wrapping it all up

This brings us to the end of our growing weed in closet guide. To summarize, yes, you can grow weed in a closet, and there’s not much difference between it and any other indoor setup.

You will need to put the same amount of consideration into grow closets as you would other indoor gardens, such as grow tents, but you need to consider ventilation.

Sure, it’s a little work, but there’s no harm in trying your hand at a new way of growing indoors. In fact, you can start fairly small by growing one weed plant in a closet and seeing how that goes.

FAQ’s About Growing Marijuana in a Closet

How much does it cost to grow weed in your closet?

The cost of growing indoors can vary depending on what setup you decide to go for. You can get as low as $80 for a basic setup, or you can go for a more expensive setup that’ll cost you roughly $350.

How do you build a grow room in a closet?

The first thing you need to do in transforming your closet into a grow room is to keep it sealed off from any outside light so your cannabis won’t be exposed to any other light source besides the grow lights in the closet.

Will my house smell like weed if I grow in a closet?

If you sealed your grow closet properly so that light doesn’t permeate into it, and you installed carbon filters in the exhaust of your ventilation system, then there’s a really low chance that your house will smell like weed. That’s not to say it won’t. There’s still a chance that it will, especially if the strain you’re growing is pungent.

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Robert Bergman


Robert Bergman is an Amsterdam-based marijuana grow expert who has years of experience from small grows to massive operations ... See profile

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