Well... I would qualify that a little. IF THEY ARE WELL HARDENED OFF and are still in pots, tomatoes and peppers can handle temperatures down in to the upper 30's. If you are just bringing them out from inside, they are very tender and temperatures that low are likely to blitz them. I would not bring tender plants out in to temperatures that low and if I were just starting to harden plants off and bringing them out for sun in the daytime, I would still bring them back in for the night at those temperatures. If they have been out and hardened off for awhile and are pretty sturdy, THEN if you get a cold snap and it goes back down to those temperatures, they will be ok.jal_ut wrote:32° F will damage any of the warm weather plants. My experience tells me to not worry unless it is threatening frost. They survive, even with cool nights. Yes, even if it gets down to the upper 30s, peppers, tomatoes, cukes, squash etc. do fine. If that were not the case, I would have a hard time growing anything here. Just watch the forecast and lookout it the prediction is for anything in the 30s. If its going to be above 40, smooth sailing.How about my pumpkins what types of temps can they tolerate? I'm assuming if its warm enough for my tomatoes my pumpkins and peppers will be fine?
For plants that are to be transplanted in to the ground, the most important temperature is the soil temperature. The squash and cukes especially are very vulnerable to cold soil and will be very set back.
For things that are direct seeded in the ground, the situation is very different. If the seeds sprout at all, the plants are automatically hardened and much less sensitive.