While snowed in this week, I had the opportunity to watch the temperatures inside the cold frame compared to the outside air temperatures. I knew that snow is a good insulator, but was truly amazed at how well it does the job.Without any additional blanketing, my cold frame temperature is generally about 8-10 degrees above the outdoor temperature. With a couple of thick blankets, the differences increases to 10-12 degrees. Two inches of snow increased the temperature difference to a whopping 20 degrees! I could have left my plants in the cold frame during this cold snap. Next time, I will!
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