OM Microbial Inoculant (1 qt.) Beneficial microbial blend of ONE TRILLION microbes per cubic inch. Very successful in all types of growing environments such as greenhouses and indoor gardens with hydroponics solutions. Applications range from a huge variety of plants, forage crops, vegetables, meadows, grasses, etc. Small usage amounts are 3 ml/gallon - 30 ml/gallon of water depending on growth environment (Potted, Ground Planted or Hydroponics) You will be Amazed by the results, guaranteed!