SubCulture-M, Mycorhizae Root Inoculant contains a wide diversity of endo and ecto mycorrhizal fungi that colonize plant roots. These beneficial fungi form a fine network of fibrous strands that serve as an extension of the plants root system; increasing root area and helping plants absorb water and nutrients. Use SubCulture-M from germination or propagation all the way through harvest. Reduce the amount of fertilizer and still achieve superior growth and huge yields.