This past winter, I had tomato plants in the ground, as well as in pots, in my backyard when the temperature got down to 33, without covering them, and they did fine. Heck, the temps got down to 27, and they were covered with some heat buffers placed around them, and they still did fine.
IMHO, 40 degrees F is a cake walk for most tomato plants.
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I could sail by on the winds of silence, and maybe they won't notice... but this time I think it would be better if I swim..
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