Watering Tips for Your Lawn
Lawns need water not only during the hot, dry summer, but also in the spring and fall. When your grass begins to wilt, water thoroughly with one inch of water. This deep watering encourages grass roots to grow straight down, making your lawn less susceptible to disease and heat stress.
The best time of day to water is in the early morning when evaporation rates are low and grass can dry completely. If you water in the evenings, the grass doesn't have enough time to dry, and excess moisture makes the lawn susceptible to disease.