A 100% naturally effective lawn feed, Phostrogen® Organic Lawn Food is suitable for all lawn types. Long-lasting, it will keep feeding your lawn for up to 100 days, ensuring a thicker, greener and more durable lawn. For use on young and established lawn types, this well balanced feed not only feeds the grass, but helps improve the soil underneath. Phostrogen® Organic Lawn Food is certified for organic gardening by Organic Farmers and Growers.