Pam Dawling, author of Sustainable Market Farming: Intensive Vegetable Production on a Few Acres, has created this set of guidelines for the temperatures in Fahrenheit for when some commonly grown fruit and vegetable plants will likely die. This list covers temperatures for plants with no row cover or other added protection. You can find more at her website www.sustainablemarketfarming.com/. Keep in mind that hardiness will vary with the location and growing conditions of your garden. 35 Basil 32 Bush beans, cauliflower curds, corn, cucumbers, eggplant, melons, okra, peppers, tomatoes. 27 Outer leaves of most varieties of cabbage 25 Broccoli heads, outer leaves of Napa cabbage, dill, most Asian greens (tatsoi, pak choi, etc.) fennel, large leaves of lettuce (onion scallions, radicchio. 22 Arugula 20 Beets, radishes, turnips 15 Broccoli leaves, cilantro, endive, kohlrabi, some varieties of kale 12 Carrots, multicolored chard, leeks 10 Brussels sprouts, green chard, collards, kale