50 Pcs Soilless Planting Sponge Garden Cubes Wool Cap for Culture Substrate Soilless

After high temperature treatment, non-toxic and sterile. The bulk density is low, the texture is and the porosity is large. Good air permeability, strong water absorption and drainage. Made from fondue spun into beard-like fibers, then compressed into cubes. Suitable for growing and colonizing all kinds of plants.