It's 34 degrees rn, but with coverage and my reptile heat lamp (originally purchased for the birds a few years ago, because occasionally they were going to be in suboptimal temperatures), it's 38 in the... lemon bubble. Of course, the proof of this concept will be when the temps get below freezing. The citrus really shouldn't go below 30 F.
Edit 2.5 hours later: 44 degrees in the lemon bubble.
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