Unfortunately we did loose a few plants in the greenhouse last week in that final winter storm. The temp here dropped to 16 a night or two, and that was just a little too cold.
Fortunately it only affected the plants on the lower shelves at the outside edge of the greenhouse. Stored there were the zucchini and cucumbers. It seems that about half of the plants are frost bitten and dying. Since I had left 2 sprouts in each bucket, many of the buckets are still ok with one live plant in it.
If there was more winter to go, it would make sense to buy a propane greenhouse heater to deal with the extra cold nights. As it is though, it doesn't seem wise to buy a heater this late in the season. All we have in there now is a tiny 1500 watt electric heater. It does its best, but 1500 watts is not much for a 1x20 greenhouse in weather below 20 degrees!
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