Contains slow release nitrogen for long-lasting results plus high iron content along with other trace elements to produce super greening power. Ideal for use on Centipede, Bluegrass, Perennial Ryegrass, Fescue, St. Augustine, Bahia, Bermuda, Zoysia, and Bentgrass lawns. Analysis: 15-0-15. 20 pound bag covers 5000 square feet.