Marijuana which one is the right soil?
Friday, November 30th, 2007SAND - both construction or horticultural - was much more popular as a soil ingredient before vermiculite and perlite were available. It performs many of the same duties in the planting mix; stabilizing water retention and loosening the structure. The problem with sand is its weight. Even a cupful of sand adds considerable weight to a container. GRAVEL - holds a little water on its surface and loosens soil. It is heavy and tends to sink in the medium. It is sometimes used alone in hydroponic mixes. LAVA - holds water on its irregular surface and holes in its structure. It is lighter weight than gravel. It is sometimes used as a hydroponic medium. Clay pellets are sometimes used in place of lava because they are lighter weight Pea size pieces are the best to use. STYROFOAM - is hydrophobic, and is used to keep mediums dryer. It is extremely lightweight and tends to float to the surface of the medium. Usually the little balls are used but sometimes irregular chips are.