Watering Your Lawn: Your lawn needs about 1” of water per week. You will want to water 2 – 3 times a week to promote a healthy root system. Depending on your sprinkler system, 30-40min of water should get you about a half inch. To get an accurate time, place several empty tuna cans at various places on your lawn. Water for a half hour, then measure the water in the can.
Remember, Deep but infrequent watering is the key to a healthy root system. Shallow but frequent watering promotes a shallow root system that will be prone to disease and weeds.