How to Build a Marijuana Grow Box At Home

marijuana grow box

Have you ever wanted to grow weed at home but didn't have enough room or privacy to do it? Or maybe the cost of setting up an indoor grow is just too high and you don't have a backyard to grow weed outdoors. Whatever your reason (or reasons) for wanting to grow weed in a box, Leafbuyer is here for you with this comprehensive guide on how to make a DIY marijuana grow box! It doesn't take a handyman to throw this project together, just a little bit of time and effort (and a lot of aluminum foil).

If an affordable, efficient, and downright sneaky method of growing weed sounds appealing that's probably because it is. Not only are marijuana grow boxes inexpensive to make, they're also inexpensive to maintain! And don't forget just how amazing it is to be able to hide weed in plain sight. It's a foolproof plan since most people expect to find weed in a dispensary, not in a box.

Marijuana grow boxes really are one of the most futuristic methods for growing weed. If self-contained gardening in shiny boxes doesn't sound like something from a sci-fi film, then I don't know what does. So get yourself some foil and your favorite strain and get ready to grow weed like it's 3019.

What is a Marijuana Grow Box?

grow box

For those of you at home wondering, 'what in the world is a marijuana grow box and why would I want to make one?' you're not alone. Despite being one of the cheapest, easiest, and sneakiest ways of growing weed, grow boxes still aren't as popular as they should be. But what kind of weed lover wouldn't want an entirely self-contained cannabis growing chamber? That's right! A marijuana grow box is essentially a large box with shiny insides, grow lights, and ventilation fans built in. Sounds pretty nifty, right?

And it only gets better! Since grow boxes are so small and reflective, you'll get a lot of bang for your electricity's buck. Lots of growers even invest in expensive lighting for these boxes since they're more energy efficient. Pricey lights aren't necessary but they sure do pay off in the long run. Grow boxes are also incredibly versatile and can be as fancy (or as basic) as you want! From pre-made tents that come with all the swanky attachments to the basic cardboard and foil box with thrift store lights and fans, DIY marijuana grow boxes let you set your own speed. So think about your price range and, if you're being honest, your DIY capabilities, and get ready to build your own marijuana grow box.

Tools for your DIY Marijuana Grow Box

lamps in grow box

Having all of the right tools for making your DIY marijuana grow box is important. While some DIY projects can be done without certain supplies, you'll find this box hard to finish (at least correctly) if you're missing anything. And a bad grow box usually translates to a bad weed-growing experience. Lucky for you, these items are generally cheap and can be found either around the house or at a local thrift store! And when in doubt you can always try Home Depot.


  • Large cardboard box
  • Pencil, pen, or marker
  • Measuring tape or ruler
  • Aluminum foil
  • Reflective duct tape
  • Grow lights
  • Two small fans
  • Surge protector
  • Boxcutter
  • Growing pots
  • Soil
  • Weed or weed seeds

How to Make your Marijuana Grow Box

Now that you have everything you need to make your marijuana grow box it's time to read the directions and follow them closely. Remember, you can always use more expensive or more advanced tools and techniques when assembling your DIY marijuana grow box. This guide's aim is to make grow boxes accessible to anyone. If you want to use an armoire instead of a cardboard box, then that's your prerogative! This can be a fire hazard though, so make your box with care and safety in mind.

Also, make sure to lay out your supplies and tools before starting on the project – you'll want everything close by. Smoking weed while assembling your box is an option but may result in slow progress.

At this point, if you’ve already decided a marijuana grow box isn’t for you, check out Leafbuyer’s cannabis deals so you can just buy your weed! If not, keep reading!


marijuana leaf in the sun

  1. Place the cardboard box on your work surface standing taller than it is wide. The box needs to be big enough (both vertically and horizontally) to fit at least one moderately-sized plant. The bigger the box the bigger the grow.
  2. Measure and write down the diameter of your fans, then do the same for your outlet plug from the grow lights. You'll want to be precise here so don't be afraid to measure everything twice!
  3. Once you're sure your measurements are accurate, mark up the cardboard box with your pencil, pen, or marker. The first fan should be approximately three inches from the base of the cardboard box on the side opposite the opening while the second fan should be three inches from the top of the box on either the left or right side. Mark your outlet hole through the top of your box in whichever spot best suits your grow lights.
  4. After measuring and marking the box, carefully cut out the two fan holes and outlet hole with the boxcutter. Don't get reckless here – it's an important step (and boxcutters are sharp)!
  5. Remove and discard any excess cardboard from the box and test each hole to make sure the fans and outlet fit perfectly. If they do, then great! If not, adjust and re-test until the results are satisfactory.
  6. Now grab your aluminum foil and get ready to roll! You're going to coat the entire interior of that box in shiny foil – don't be stingy, you don't want any cardboard visible. The foil should stay up without adherent, but you can use glue at this stage if you want (to make a mess).
  7. Carefully make incisions in the foil over your holes and fold the extra foil outwards for more coverage.
  8. From inside the box, push your outlet through its hole and pull through until your grow lights are comfortably situated in the box. Attach with your reflective duct tape.
  9. Place the bottom fan in its hole, making sure it is situated to blow air inwards rather than blow it out. The top fan should be situated with the air blowing outward. Attach the fans only when you're SURE they are situated correctly using as much duct tape as you feel necessary. Remember that airtight is good and more airtight is even better!
  10. You're almost done with your DIY marijuana grow box after attaching your lights and fans. Now all you have to do is double check the box to be sure it is aluminum foiled to the max. Anything that can be covered in foil should be covered in foil – your plant will love all that reflected light.
  11. Test out the door, the fans, and the lights. Use your surge protector to avoid the stress of figuring out how to put three plugs in two outlets.
  12. Now your DIY marijuana grow box is ready for all of your weed-growing needs! Just turn on the lights and the fans, stick your plant (or plants) inside, and water when necessary. At this point, if you know how to grow weed, then the box will do the rest! Just keep an eye out for fire hazards since losing your box along with the plant inside would really suck.