PetiGreen Stop Dog Urine Damage to Your Lawn 16 oz Repairs the Nitrogen Cycle in your soil and Improves the overall health, color and growth of your lawn within weeks of first application. Prevention of new urine spots will start gradually, usually within a few weeks and will improve over time and repeated applications. 16 ounce bottle covers 3200 sq ft (Small Lawn) Application every 6-8 weeks is recommended. Easy to apply using a hose end sprayer. Bare spots can be re-seeded 3-4 weeks after first application. Safe for family, pets, plants and the environment.