I don’t think it’s a cold pocket, lots of the concrete jungle around me. Give a few more winters you will get damage. Not sure how accurate those charts are, but for example 28 is okay for a couple of hours, but if you have multiple nights/hours in a row I think it will damage. This year was mild. They year my bears lime was damaged my passionfruit was fatally injured by cold. Past two winters passionfruit had minor cold damage. I have a key lime next to my bearrs as well loaded with blooms and still holding a dozen or so plump limes.
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