Check the listing for details. Winterizer For Established Lawns 25-5-6 with Phosphates, 20 lb. Condition: New. Listed at 42.36 USD. Winterizer For Established Lawns 25-5-6 with Phosphates, 20 lb PRODUCT DESCRIPTION Keep your lawn beautiful and green even throughout the winter with Fertilome! Key Product Features Lawns: 20lbs per 5,000 square feet Trees: 1lb per inch of trunk diameter Shrubs: 1 cup per 3 ft. of height Helps build vigorous root systems Apply in the fall to both lawns and shrubs. It enables turf, tress & shrubs to withstand the rigors of winter better and easier. Its effects are similar to putting on an overcoat in the winter. Applying extra potash enables warm season grasses to com through winter better and be healthier in the spring. Builds hardiness, stem strength, and disease resistance insuring a healthy, stable plant to better survive winter.