Your lawn needs a half inch of water, 3-4 times per week.
How long should you run your sprinklers to to get a half inch of water?
For my sprinkler system its:
20 minutes per zone for spray heads.
45-50 minutes per zone for rotors (yes, that is a long time...it should be for rotors).
That will give me a half inch on MY lawn from MY sprinkler system...YOUR system is going to be DIFFERENT!
So how can you determine watering times for your sprinkler system? It's quite easy...I'll explain everything in the video...
