 All the green and black stains, you'll get those to clean up really quick since we've had rain. You can see those clean up in a week and sometimes just a couple days if you have some pretty good rains. The black stains will take a little bit longer for you to clean up, but now is a great time to get it on there. That way, it's ready for winter. It cleans up all winter long, especially if you have some areas where you've had stains on for years and years and years.