G22-006: Mason jar as frost protection — a winner!
An inverted mason jar gives six or seven degrees Fahrenheit of frost protection. I never would have guessed that. I had to do this experiment twice, because I didn’t believe the results the first time. For two nights running, I left a pair of temperature loggers (digital recording thermometers) on a raised garden bed, … Continue reading G22-006: Mason jar as frost protection — a winner!
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