I have dogs so I don't use pesticides or fertilizers. My lawn is green in the summer, but if you look closely you will see the weeds. I leave a lot of the "natural" plants that come up, especially if they have flowers. My only war is with vines, but that is hand to hand combat. Not sure why anyone would be using pesticides and fertilizers knowing that it would pollute the lake. We planted as many natual plants as we could. I'm crazy about using natural materials.