All natural and organic, all season lawn food with Bio-tone microbes. Step 2 in the Espoma organic annual lawn feeding program or any time during the growing season. Bio-tone microbes help make nutrients more available and promote faster greening, deeper roots, and improved soil structure. Safe for kids, pets, and the environment. Doesn't burn lawns or leach out of soil. Provides long lasting nutrition and creates healthy lawns and soil. Requires less frequent mowing. USDA (United States Department of Agriculture) certified organic.