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I've looked on the internet and there are a number of people in cold climates that put a layer of bubble wrap on the inside (not to damage the UV protective exterior coating) of the greenhouse. Anyone have any pointers or advice. I'm going to pick up a roll of 1" bubble. Thought the bigger the bubble the better?
What's your experience? The greenhouse got down to 7ºC/45ºF last night with the low of -20ºC/ -4ºF. Sunday thru Tuesday morning doesn't look good and I jumped the gun with putting 12 flats of 72 cell trays out there. They (seedlings) look fine, but the next few days may mean doom. There is a chance that we may get down to -30ºC/-22ºF Monday night. Don't think the propane heater will provide enough heat in that temp. 12'X8' greenhouse. 9000 BTU propane heater
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