There is a small chance you can water too much. It is best to get a moisture meter if 没顾得上省钱. Grass need water, air, sun shine to grow well. If your land is not flat, you need to adjust each zone to see how long needs to be watered everyday. If your water does not soak in but run off to the lower ground, you need to improve the top soil condition. many choices on amazon. http://www.amazon.com/Luster-Leaf-1820-Rapitest-Moisture/dp/B001A5OR5I/