A highly concentrated soil inoculant, Advanced Nutrients Tarantula contains 19 types of organic beneficial bacteria that colonize plant roots giving you growth and harvest benefits you've never imagined. This mixture of diverse and extremely rich microorganisms forms a symbiotic relationship between the plant's root zone in the rhizosphere. Produces extremely healthy plants and superior root systems making the plants able to sustain many different types of stresses produced by the variables of nature. Ideal for soil and hydroponic growing mediums. OMRI Listed for use in organic production.