The original biological activator for the soil, called "Yogurt for the Soil" by natural gardening experts, stimulates beneficial organisms in the soil. You'll notice a healthier, stronger root system because it actually loosens and balances the soil. It's 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. It's also fortified with essential micronutrients.