Five to eight fluid ounces (5-8 oz.) of Tenacity herbicide will cover one full acre. When used as a pre-emergent: Mix 1/2 teaspoon of Tenacity to 1 gallon of water to cover 1,000 sq ft. Water in with 1/4" of water within 1-2 days of application. When used as a post emergent: Mix 1/2 teaspoon of Tenacity with 1 1/2 teaspoons of non-ionic surfactant to 1 gallon of water to cover 1,000 sq ft. Spread evenly across lawn. Repeat in 10-14 days