Depends on the type of system you have. Mine is recommended at 90 minutes to get the water deep into the ground. I run it about 60 minutes two or three times during the rainy season. Lawn is established. In my county you can only water two times a week on given days during daily light savings time. Once a week the rest of the year. Bushes, after a year or two might be able to be skipped. I run 5 minutes just to use the zone. I do pay attention to the grass and would adjust the times if needed.
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