Judy, I have a garden as big as yours. We have rainbirds on poles. Two run at a time, and the nare hooked to a timer. We water twice per day and each sprinkler runs 10-15 minutes depending on how hot it’s been. When the first two shut off, two more start up, then two more until a total of six sprinklers have run. (two at a time, so three ten-minute intervals). With six sprinklers, we can water the whole garden. It works well for us.
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