Your established lawn is an investment, so prepare it for winter with Winterizer for Established Lawns by ferti-lome. This lawn treatment is specially formulated to protect, nourish, and strengthen grass roots during the winter months. Applied in fall, Winterizer for Established Lawns will pay dividends in the spring when your lawn is healthier and more disease-resistant - even after a long, cold winter. Trees, shrubs, ornamental plants, and evergreens will also benefit from a fall application of Winterizer for Established Lawns. 40 lb. bag.