No heat greenhouses
Joan:
Sorry for the late reply.
My greenhouses will have minimal added heat, and we will use cold weather crops that can survive most of the coldest winter nights. Kale, Brussels sprouts, broccoli and others are very cold weather hardy.
I've done some experimenting this spring and the lettuce and peas did just fine in the teens, with limited covering and no added heat. I will have solar panels for each greenhouse that take the sun's warmth and pipe it underground, but this will just take the edge off. I don't expect it to heat up the greenhouses much.
Even cold frames, row covers and other simple coverings make a big difference as long as you start the crops during the last of the traditional growing season and don't water much during the winter.
Clair
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