i dont know if its styrofoam, but perlite is used for the aeration of the soil, i wouldnt try styrofoam, it may have bad side affects for the plants, i would stick to perlite or grow cubes for aeration.
sensiskunk Reviewed by sensiskunk on . Soil Isnt perlite, styrofoam?, or however you spell it... I was told thats what it is.. can you use it as perlite?.. Rating: 5