The Nitro-phos Fall Special 8-12-16 Fertilizer is specially designed to ensure turf grasses will stay strong and disease resistant over colder Fall and Winter months. This fertilizer is formulated for use on St. Augustine and Bermuda grasses. *This product has been replaced by our private label fertilizer manufactured by Nitrophos. It comes in a 50 lb. bag and is cheaper than the original's 40 lb. bag.