If there's a deep freeze, definitely turn the sprinklers OFF. However, I've been told by several landscapers/gardeners that even during the winter run the sprinklers in the evening between 8 and 11 pm, never in the morning when there is a chance of a light frost (cold and/or frost and sprinkler water do not mix well unless you're deliberately setting up an ice layer like citrus growers do) for 5-10 minutes and you only need to do it once a week unless you have new plants (and who would plant in the winter here?).
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Army/embassy brat - traveled too much to mention
Moved here from SF Bay Area (East Bay)
"There are only two ways to live your life: One is as though nothing is a miracle; the other is as though everything is a miracle." Albert Einstein
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