Resetting your controller is not easy but it is vital to water conservation. You can learn how to set your irrigation controller more accurately by using The Water Calculator on your regional Water-Wise, Water-Smart or California Friendly website.
We know how hard the old controllers are to manage. We feel your pain. So we strongly recommend you buy a new one. In the last couple of years the new low cost controllers have been revolutionized in regards to features and ease of use. New features include multiple cycle starts, (which means you can water for a little bit, stop let it soak in, and then it cycles back and waters a little while later rather than watering all at once with most of it running off into the street or off the property) another is
Find this logo on the website Click on it and answer some simple questions about your landscape. A custom schedule will then be created for your irrigation controller which you can print out and use.