I recommend square containers for growing. In general, you can fit more plants in areas if you use square plants. You can use water jugs, plastic milk cartons, etc. Using recycled “pots” instead of actually buying pots will save you a ton of money, and it’s good for the environment.
Personally, I use 2-liter soda bottles. Though they aren’t square, they work perfectly. 13 can be fit into a normal sized cat box (though it’s a little bit of a squeeze). A 2-liter bottle will provide enough space to grow a 3-foot plant fully to maturity, if it’s grown hydroponically. A typical closet can hold at least 4 cat boxes, so that means you can grow up to 52 plants. Of course the plants should be stored like this while in vegetative state, but spread out more once flowering begins.
Recycled Pots
You can use a number of different things to grow in. Growers have had success using old buckets, varied 3-5 gallon containers, plastic garbage cans, and even plastic garbage bags. The only thing I do not recommend using is paper milk cartons, as they can mold, and start to disintegrate after a while. Plastic and other inert materials are best for grow ops.
Especially when using recycled pots, it’s vital to sterilize them. I use a solution of bleach and water. Mix around 2 tablespoons of bleach for every gallon of water used. Leave the solution, as well as the rockwool or other growing medium, to soak for several hours. Then, rinse thoroughly with water, making sure all the bleach gets out.
