Foxfarm, pt, bush doctor microbe brew, liquid fertilizer, complex blend of ingredients specially formulated to help plants achieve optimum microbial habitats at the rhizosphere or root zone environment, contains concentrated amounts of fungi & bacteria spores that will inoculate large populations at a rapid pace, also contains macro & micronutrients that feed not only the plant, but also ingredients specially formulated to feed the actual microbial population, can be used in both hydroponic & soil applications.