Cold Hardy vegetables can be killed anywhere from 30ºF all the way down to -5ºF and possibly lower. It covers such a wide range of temperature that they are usually put into two different groups, semi cold hardy which can take light frosts and cold hardy which can survive to 20ºF and below.
First let's talk about the crops that can take several light frosts. Light frosts would be in the 28-32ºF range. Crops that can handle light frosts include lettuce, swiss chard, arugula, radishes, beets, chinese cabbage, collards, cauliflower, celery, turnips, and green onions.Read More