Scotts Turf Builder Winterguard Fall Lawn Fertilizer protects and strengthens your grass in the cold season for a better spring lawn. This fertilizer works beautifully with any grass type, and includes Scotts premium Water Smart formula to improve your lawn's ability to absorb water and nutrients. Scotts Turf Builder Winterguard Fall Lawn Fertilizer is strong enough to do the job, but it's also kid and pet-friendly. This bag covers 15,000 sq. ft.