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Budget-Friendly Guide To Building Your DIY Indoor Cannabis Grow Room

Regular cannabis users often decide to try and grow their weed. And the first step is deciding whether to grow it outdoors or indoors. Outdoor cannabis growers usually produce significantly higher yields, but indoor growers may notice that their crops produce denser, more potent buds. 

If you don’t have much garden, indoor growing is the way to go. But for would-be weed growers, the prospect of expensive equipment is a hurdle. Fortunately, it’s possible to grow cannabis indoors, even on a tight budget.   

Are you keen on having an indoor grow room that doesn’t break the bank? This is our budget-friendly guide to building a DIY indoor cannabis grow room.

Choosing The Right Space For Your Grow Room 

The first step is to choose the space you’ll be using for your cannabis grow room. Indoor cannabis growing requires a controlled environment, so choose an area that allows you this type of control. The one you choose will usually depend on the interior size and dimensions and, of course, practicality.

A garage or barn should be a last resort unless you have excellent security and high walls around your property. If your house has a cellar, this can be a discreet option that doesn’t take up the living space in your home. 

Avoid using a room with large south-facing windows, particularly on an upper floor in a high-rise apartment building. Heat control may become an issue.

Common Household Spaces You Can Use As A Grow Room

Outdoor cannabis growing is usually simple enough. Pick a section of your garden or place growing pots on your patio or yard. In an apartment with no garden or balcony, you can only grow your crop indoors. And things can get a bit trickier. 

You might not be able to dedicate an entire room to growing your weed so your space may be more limited. The factors mentioned above will apply, but your unique living arrangements will also come into play. 

Preferably, choose a room that is unlikely to be disturbed by pets or curious children. It should also be far enough away from the entrance so that it is not in visitors’ line of sight. If you have a second bedroom, a store room, or a walk-in closet that you don’t need to use, these can all work well as indoor grow rooms. 

Equipment You Need For A Grow Room 

Indoor weed growing requires some essential equipment, most of which you wouldn’t need for outdoor growing. Don’t stress too much about the costs, though. There are some budget-friendly options available. 

Here is an outline of what you’ll need for a micro cannabis grow room, suitable for a small space in your garage or a small room in your home. 


A grow tent provides an insulated, optimal environment for cannabis harvests. It also offers much-needed privacy from prying eyes and helps to contain the tell-tale weed smell in your home.

Panda Film

Cannabis plants need both light and dark periods to flower. Any light leaks during what should be the dark hours can stress your plants, stunting their growth and inhibiting flowering. Cannabis plants also need regular watering. So, the material you use to build your growing tent must be light-proof and waterproof.

Panda Film is a type of foil with 85–95% reflectivity, made from a durable polyethylene material. It has a black and a white side. Use it with the black side facing out and the white in. The white side reflects light onto your weed-growing crop. 

It is a top choice among indoor weed growers. It is not only lightproof but also waterproof, making it ideal for your grow room tent. But how much Panda Film will you need? 

If you want your plants to reach their full potential, the grow tent will need to be at least 1.5-2m tall. Any smaller and they won’t have enough space to properly grow and they may also be too close to the growing lights.

PVC Pipes

PVC pipes are cheap and sturdy. This makes them the perfect choice for building the frame of your budget grow room tent. The length of the PVC pipes will be subject to the size of the grow room tent you are making. However, remember what we said above – the tent should be at least 1.5-2m tall.

You will need: 

  • 16x straight 19mm width PVC pipes for the verticals and horizontals of your tent frame
  • 8x 90-degree corner fittings for the frame’s corners
  • 4x t-fittings that will allow you to connect pipes at a 90-degree angle
  • 1x cross fitting for the middle of the tent to provide extra stability and hold a fan and lights

Velcro And Duct Tape

You’ll need a roll of duct tape and Velcro (the type with an adhesive backing). The duct tape will be used to assemble the Panda Film sheets into the tent, and the Velcro will be used to fashion an opening and closing section in the front of your growing tent.

Affordable Grow Lights

Cannabis plants need at least 18 hours of light per day during the vegetative stage and 12 hours per day when flowering. Indeed, that reduction in light from 18 to 12 hours triggers flowering. So your cannabis growing room needs grow lights. You have two options: HID (high-intensity discharge ) or LED (light-emitting diode).

If you want to save money on your grow lights initially, you can use cheaper HID lights. They are just as effective for indoor cannabis growing. 

The two main types of HID lights suitable for indoor cannabis growing are:

  • Metal Halide (MH) blueish-white light for use during vegetative growth.
  • High-Pressure Sodium (HPS) reddish-orange light for use during the flowering stage.

The better LED growing lights generate a full spectrum of light, ensuring better quality and bigger yields. 

LED grow lights are usually much more expensive than HID lights. Despite the initial expense, they offer good value for money as they are more energy-efficient and last for several harvests. 

Plant Pots Or Grow Containers

The plant pots or growing containers can be made of any material, although plastic ones are cheap and widely available. You’ll need a 3-gallon size growing container for a square meter of growing space. Adjust the size for larger growing areas. 

But whatever growing containers you choose, they should be large enough so the roots get space to grow into and have drainage holes. You’ll risk root rot from pooling water if they don’t have good drainage.

Air Circulation/Fans

Cannabis plants need adequate airflow around them to grow properly. If you overlook this requirement, your grow tent will have pockets of trapped heat and humidity. This will increase the risk of bacterial growth and pest infestations. To avoid this problem, ensure good air circulation and ventilation.

The easiest way to do this is with a fan. A small, regular wall fan is suitable for a small grow tent. You may want to invest in a fan with a carbon filter if you intend to build a large grow tent, though. It helps to dispense with the storing odor of a larger crop. 

Grow Medium

All plants need soil or another growing medium to anchor them and grow and develop. Soil brings with it the risk of pests. Therefore, another growing medium is often better for indoor growing tents. 

Perlite and vermiculite are two common choices:

  • Perlite is easy to use, lightweight, and has a pH level of around 6.6. to 7.5. You can use it to provide better water absorption and aeration when mixed with soil, or you can use it on its own. 
  • Vermiculite is PH neutral but helps to elevate plants’ PH levels. The vermiculite can absorb almost four times its volume when combined with soil and watered. 

Perlite and vermiculite are both suitable mediums, but perlite offers better aeration for roots, while vermiculite offers better water retention. If in doubt, go for perlite, as there will be less risk of root rot. 


Like any other plants in nature, cannabis plants have specific nutrient requirements. 

Cannabis plants need large amounts of the macronutrients nitrogen, phosphorus, and potassium to grow and develop in the vegetative stage properly. Most cannabis fertilizers contain adequate amounts of these.

Micronutrients like copper, iron, manganese, boron, and zinc are also helpful in far smaller quantities for essential plant processes like photosynthesis. Some cannabis fertilizers contain traces of micronutrients, too.

Setting Up Your Budget Grow Room

Once you have your materials and supplies together, it’s time to set up your grow room. You’ll also need a handsaw (for cutting the PVC pipes to size, if necessary) and scissors for cutting the duct tape and velcro strips.

Assemble The Grow Tent Frame

  • If your PVC pipes are not the length you need, you’ll need to measure them and cut them to size using the hand saw. Once the pipes are cut to size, connect them with the appropriate fittings to assemble the tent’s frame. 
  • The pipes for the vertical lines of your tent frame should be at least 1.5m long. You’ll need four of these vertical support poles for your tent frame. 
  • You’ll use four pipes horizontally for the base. The base must be stable, and all four base pipes must rest on the floor. If the base is uneven, your grow tent could tip over. 
  • Use the remaining eight PVC pipes to construct the roof of your cannabis grow tent frame. Remember that the cross-fitting should be positioned in the middle of the ‘roof.’ If you fail to do this, you will not have a central position for attaching your grow lights. Your grow tent will also lack stability.
  • Once you have assembled the frame and before proceeding to cover it, give it a gentle push. It should remain steady. If it wobbles, you may need to check all the connector fittings and ensure they are securely attached.

Cover The Grow Tent Frame

You’ll need to wrap the Panda Film around the frame of your grow tent twice. This will provide enough insulation to keep excess sunlight and create a suitable growing environment. Remember to keep the white side in for the inner layer and the black side out for the outer layer. 

Create The Walls And Roof

  • Starting with the walls, tightly wrap a sheet of Panda Film around three of the four walls (the sides and back). The front wall is where the opening will be, so attach the film to the front wall’s vertical pipes. 
  • Cover the ‘roof’ part of the frame with film, allowing 1-2 inches overlap where the roof panels meet the walls. Secure this film with duct tape.
  • Look into the tent structure and check for any light leaks; if you find any, seal these with duct tape from the outside.

Insert The Entrance Flap

Cut a piece of Panda Film long enough to run from the middle of the roof to the floor, and use duct tape to attach it to the roof. Secure it to the pipe frame on the sides and bottom using the Velcro strips.

Install The Grow Lights And Fan

Install your grow lights at the top of the interior of the tent. And set up your floor fan. Follow the manufacturer’s instructions for the lights and fan installation and use. 

Of course, the power cords will have to pop out somewhere, and the tent roof is the easiest. However, be sure to seal the place where the cord exits on the roof thoroughly with duct tape to prevent light leaking.

Advantages Of A DIY Grow Tent For Cannabis

Once you’ve constructed a grow tent and have purchased your weed seeds, growing medium, and nutrients, you’ll be well on your way to growing your own weed. 

While a grow tent is not necessarily crucial for indoor growing, it is highly recommended. There are several advantages to building a DIY grow tent for your marijuana crop:

  • It’s more affordable than buying a ready-to-go grow tent.
  • It allows you to make the most of the space you have.
  • It’s highly customizable and can easily be enlarged at a later date at a minimal cost. You’ll just need more connectors and pipes and some extra film and duct tape.
  • You have total control over your weed’s growing environment.
  • Unlike outdoor growers, who are subject to the seasons, you’ll enjoy a perpetual harvest.
  • DIY indoor growing tents offer privacy that outdoor growing simply does not allow

How Much Does It Cost To Build An Indoor Grow Room?

The costs involved with building an indoor grow room will be more than growing your crops outdoors. But the budget option details above is an affordable option. If you already have plastic plant pots, a floor fan, etc, you won’t have to spend much on equipment. 

Depending on which brands you buy and where you buy them, you may be able to get everything you need for around $300. So, if you don’t have the budget right now for ready-built grow tents and specialized supplies, this is a good place to start. 

DIY Indoor Grow Room Q & A

Here are the top questions we get about indoor grow rooms.

Do I really need a grow tent for indoor growing?

No. You can grow weed indoors without it. But it’s a lot easier with a grow tent. It provides the optimal environment for your plants to thrive because you can control the conditions inside. It’s a lot harder to control the growing conditions in a wide, open space. A tent also protects your crop and offers privacy.

Can I use ordinary aluminum foil for constructing a cannabis grow tent?

Yes, you can, but we don’t advise it. Aluminum foil DIY grow tents are even cheaper, but users often complain it creates hotspots that burn their plants.

Although some users have used it without problems, we recommend not taking risks and sticking with Panda Film.

Can I construct a cannabis grow area on any floor surface? 

Yes, you can, but the type of floor can have a big impact on the growing conditions inside your grow tent. A bare, untreated floor, for example, could absorb moisture and become a mold hazard. If there’s nothing you can do to alter the flooring, a thick, waterproof tarp (like they use for painting) may be the solution. 


Growing your own cannabis allows you to control availability and quality. It’s a fun project, and if you don’t have the space outdoors (or have nosy neighbors), you can easily build a budget-friendly DIY indoor cannabis grow room in an afternoon.

However, this is not always practical. You may not have the space or the time for indoor growing. Maybe you don’t have the confidence yet to try your hand at indoor growing. Or perhaps you share an apartment and need a more discreet weed supply. 

Whatever the case, you can rely on Embarc dispensaries for top-quality cannabis products, year-round.