Turning your sprinkler on for just a few minutes a few times a week really won’t do much to help your lawn. For a healthier lawn, learn to water your grass deeply and less often. If you water infrequently and deeply, the roots of your grass will start to grow deeper down into the soil. This helps your grass stay green during periods of drought or extremely hot weather.
Experts recommend that you water your grass with 1 inch of water, once a week. This amount of course can vary depending on your local weather conditions, soil type, grass species,plants etc.