WOW.
No mention as to the type of soil or the type of sprinklers. From sand to heavy clay is out there, and require WAY different irrigation.
You likely have 2 types of sprinklers, both requiring different times (sometimes by quite a lot).
What you need to do right now during a drought and during normal rainfall is also very different.
Flat lawns and slopes are different.
I suggest Fertigator. They do a great job on fertilizer and pests and a great job tuning your irrigation as part of the service.
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