I'm with chuck -- Northern California "soil" is pretty much clay, at least in and near San Francisco. Never aerated. I did know people who did. My lawns looked as good as theirs did (great when no drought, dead and gone after a serious drought). I've seen lawns aerated here -- doesn't seem to hurt them but not convinced if it really helps.
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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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