A large part of our household water use goes to watering our landscape and many households rely on automatic irrigation systems to accomplish this. One of the most important components of an automatic irrigation system is the irrigation controller (also called a timer or clock).
The controller turns the irrigation system on and off at the times you select. In other words, the controller controls the irrigation system and you control the controller. Having a controller with certain minimum performance capabilities is vital to efficient watering. The right controller, properly scheduled, can result in significant water savings and lower water bills.
Controller guides and other resources (including links to the websites of some of the most popular manufacturers of controllers) are listed below.