If you don’t want to worry about mixing your own growing medium, there are a lot of different brands of pre–manufactured grow cubes. Most of them are a custom blend of the mediums listed above. Feel free to experiment with different grow cubes in different containers until you find just the right mix for your plants. Grow cubes also store and stack well over time, so if you have limited space and want to stock up for the future, they’re a good buy.