Myke is concentrated beneficial soil enzyme mycorrhizae, that is found naturally in soils around the world. Mycorrhizae is a symbiotic association between microscopic fungi and plant roots. The presence of mycorrhizae increases the absorption capability of the root system, improves soil structure and microbial activity. It will continue to colonize plant roots throughout the soil as long as the host plant lives. Once the plant dies or if the soil is tilled the fungal hyphae will die and resting spores will remain. OMRI listed for use in organic farming.