Espoma Organic Weed Preventer-25 lb. CGP25, 25 lb Made from corn gluten meal Feeds lawns to ensure a deep, green color and prevents weeds by inhibiting root development in seedlings Apply twice per year, early spring and fall Granulated for easy application, Espoma Organic Weed Preventer provides long lasting nitrogen for a thicker, greener lawn Children and pets can safely play on lawn after application.