Lawns need less water than most people apply.
Lawns are often over-watered. Almost everyone has seen water running down the gutter from someone’s lawn sprinklers. But it is not the lawn’s fault that sprinklers are left on too long and water is wasted. The real challenge is watering a lawn correctly.
Typically, sprinkler timers are set by trial and error to a schedule that provides enough water during the hottest weather conditions, and therefore they turn on too frequently and stay on for too long during cooler times.
As a result, lawns have gotten an undeserved reputation for using a lot of water when it is actually a matter of improper settings on the sprinkler timer.