These grow bags are so easy to make and use old feed bags! If you keep chickens, ducks, or any type of animals where you buy feed in 50lb bags, you can make these! If you don't keep these animals yourself, ask a friend who does.
Before you start hoarding feed bags, check them to see what they are made of. Ours are made out of plastic (specifically #5). If you need to check if the type of plastic is safe, take a look at our other post that shows you how: Reusing Plastic Containers For Plants.
Constructing them is simple. Get your utility knife and poke a bunch of drainage holes in the bottom of the bag. Poking and twisting with the knife usually makes good sized holes. Once your drainage holes are completed, roll the top of the bag down evenly on all sides until you get the depth you are looking for. Fill them up with some good quality soil and you are good to go!!