The original biological activator for the soil, called Yogurt for the Soil by natural gardening experts since it stimulates beneficial organisms in the soil. Youll notice a healthier, stronger root system because it actually loosens and balances the soil. Its excellent for revitalizing tired, overworked lawns and gardens. Medina Soil Activator can be used with most fertilizers, herbicides or pesticides or in conjunction with natural soil building practices. It is excellent for compost piles and derived from a complex bio-catalyst process. Its also fortified with essential micronutrients. It stimulates, strengthens and multiplies the soils indigenous microbes and bacteria.