We brought our potted lime tree into our lanai. Probably not necessary but it still has fruit on it. The last time we had a really bad stretch of frost was January 2017, I think. Then we only lost one very young hibiscus, without covering anything . Now basically I don’t worry if the daytime temps go back up after a cold night. It is only if the cold continues all day as well as night over at least 2 days
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