These microscopic fungi attach to & colonize the root systems working in symbiosis with plants. It benefits the plant by increasing water & nutrients acquisition (especially phosphorus， copper & zinc). Ensures optimum growth， especially when high air capacity & extra drainage are required Contains approximately 2.8 cubic feet of growing medium Ideal for water-sensitive crops， rooting cuttings &/or low-light growing conditions Mycorrhizae promotes plant growth and reduces stress Potting Mix Imported Your security is our number one concern