Viagrow Coconut coir bricks are composed of 3 different types of compressed coconut coir crafting the perfect mix for root production, growth and yield. This 1.4 lbs. (650 g), high quality, low sodium, triple washed, sterile growing medium is an alternative to sphagnum peat Moss and requires lowering watering frequency. When hydrated with water, Viagrow Coir bricks and blocks rapidly expand which saves you time and effort. The coir bricks can be exclusively used by themselves, blended or mixed with expanded clay pellets, code: VS10, perlite, code: VPER4, vermiculite, code: VER4, topsoil, earth worm castings or a compost of your choice. With an incredible cation exchange and desired air to water ratio it is a good growing media for use with enzymes and beneficial bacteria products that convert roots to biomass. Great for all plants, clones, seedling and germinating seeds, mushroom cultivation, and brown matter during composting.