The Sanctuary 16-2-4 Fairway Grade Organic Fertilizer 50 lb delivers excellent residual color and growth for all turf types including golf, lawn care and sports turf. This product is ideal in areas where phosphorus is restricted. The application rate is 4 bags per acre for 8 to 12 weeks of residual growth and color. For improved stress and disease management, the rate is 2 bags per acre per month during hot weather.