How To Build A Grow Room In A Basement

Take a look around your home to see if there are any areas that may be utilised for a cannabis grow room. If you take into account a few important requirements, a basement full of old and unwanted stuff may be a great place to grow.

How to create a basement grow room will be the subject of this post. We’ll walk you through the whole process of setting up a cannabis farm in your basement.

The Good and the Bad

Having a fully-functioning grow room in your basement may ensure that no one on the upper levels is aware of what’s going on in your basement. If you want to keep your garden private and secure, this can assist.

Basements tend to be colder than the above levels. If you’re concerned about the heat generated by the grow lights, a cold basement is your best bet.

It’s important to think about the drawbacks of a basement grow before getting started.

  • Roots of marijuana plants might be badly affected by lower temperatures in basements, although a heating mat can give some warmth.
  • As a result, basements may not be as private or secure when you need to repair electrical panels or water heaters in your basement.
  • In the event that your basement is unfinished, you will need to spend a significant amount of money on electrical wiring and plumbing as well as ventilation and grow room insulation, drywall, and grow room wall panels.
  • You’ll need to think about the safety of hauling heavy goods like buckets of water, lights, and other growth necessities up and down the basement steps.
  • Mold and mildew may thrive in a home that doesn’t have enough ventilation or climate control.
  • Groundwater flooding and excessive humidity may necessitate the purchase of a sump pump and a dehumidifier.

How to Make a Basement Grow Room

In light of the information above, it’s time to analyse the most important needs for an indoor grow space in general.

We have everything you’ll need to get started:

  • Enough room for the plants you wish to cultivate.
  • Enough power to run the grow rooms’ equipment.
  • Plants need light to grow.
  • Continuous airflow eliminates old air and replaces it with new air
  • A heating and air-conditioning system for your cannabis plants
  • If you want to grow all year round, make sure you have separate sections for the vegetative and floral parts of your plants.


Plants require lots of room to grow and thrive, even in a large basement, so make sure there is enough room for you to go around and care for your plants. Your plants may appear to be modest at first, but they may grow into enormous specimens that require a lot of room to expand both vertically and horizontally.

Light and Heat

It’s important that your space can handle the light cycles that occur throughout the vegetative and blooming stages. It must be illuminated during the day and entirely dark at night. A sheet of foam cut to the precise dimensions of your basement window might be used to seal it using caulk or tape.

The Floral and Vegetative Room

If you want to cultivate both vegetative and blooming plants in the same basement, you’ll need two distinct rooms: one for vegetative plants and another for flowering plants.

Vegetative rooms tend to be smaller than blooming rooms, however this is not always the case. It is possible to grow flowering rooms four times larger than the vegetative space. Grow tents are a great way to divide up your basement into various areas.

If you want to do everything in your basement, including planting, drying, and curing, you’ll probably want to set aside some space. It’s possible to dry your plants using a drying tent, for example.

Increasing the Concentration of CO2

The CO2 levels in a grow room may be increased if desired by indoor growers. It can be done in one of two ways:

  • The CO2 produced by a CO2 generator comes from either propane or natural gas. This can raise the temperature in your grow space.
  • Bottled CO2 is more convenient, although tanks may be hefty and costly.
  • To get the most out of your CO2 enrichment system, follow these suggestions.
  • Control CO2 levels with a CO2 ppm controller.
  • Since cannabis plants cannot absorb CO2 while it is dark, use CO2 when the lights are on.
  • Because CO2 is heavier than air, it is best to release it near the ceiling, where it will settle.


Prior to constructing different rooms for vegetative and blooming plant growth in your basement, it’s time to clean up the space and determine whether or not to grow in it. Preventing a pest invasion by thoroughly cleaning your basement is a good idea.

Check that your grow room has a designated location near the door for storing new clothing. Pests are less likely to enter your garden this way. To store sterilised tools and other cleaning equipment, such as mops and vacuums, in this area is a good idea.


Concrete flooring with drainage is the best option for a growing basement. In an ideal world, your marijuana plants would be growing in a room devoid of carpet. You can use a waterproof floor covering like thick plastic to protect your flooring from moisture if you can’t remove your carpet or don’t have concrete.

Flow of Air

In-line duct fans can help you keep your plants healthy by circulating fresh air throughout the system. Your plants will benefit from fresh carbon dioxide and stale air being removed by installing ductwork.

Make sure your carbon filter, ducting, and fans are all the same diameter while setting up your ventilation system. The air throw of a fan should be taken into consideration when purchasing a fan to guarantee that it can cool the size of your space.

Calculate the amount of air exchange you need in your basement grow area before purchasing a fan. Every five minutes or so, the air in an indoor grow environment should be exchanged. CFM is a common unit of measurement for industrial machinery.

Exhaust fan CFM calculations begin with figuring out the size of the space. The volume of the basement may be calculated by multiplying the basement’s length, height, and breadth.