Gordon’s Trimec Weed Killer Concentrate (1 quart) covers approximately 8,000 square feet when used on cool-season grasses, mixing 4 fl. oz. per gallon of water to treat 1,000 sq. ft. For warm-season grasses, it covers about 16,000 square feet, using 2 fl. oz. per gallon for 1,000 sq. ft. Always follow the product label instructions for proper mixing and application rates based on your lawn type.