Jonathan Green Winter Survival Fall Lawn Fertilizer. 15 pound Bagged Granules covers 5,000 square feet. This 10-0-20 NPK formula is ideal for winter turf protection and fall seeding. It provides a well-balanced formula that keeps the lawn greener later into the year. The iron and sulfur content helps maintain a deep green color. Suitable for all grass types and safe for Bermuda grass. Apply during the fall season when conditions are dry. OMRI certified, non-organic, and not water-soluble.