A 15-5-10 lawn fertilizer blend formulated with six added nutrients, including magnesium, sulfur, copper, iron, manganese, and zinc. K-8 is suitable for St. Augustine, Bermuda, Bluegrass, Buffalo, and other common lawn grasses. Apply one 40 lb. bag per 5,000 square feet of lawn, beginning in early spring as grass starts to green and repeating through the summer if needed. Fall applications are also recommended. Do not apply to wet grass and water the lawn soon after fertilizing.