“Hardy” vegetables such as: cabbage, broccoli, cauliflower, Brussels sprouts, carrots, turnips and kale can tolerate temperatures to the low 20s before they show signs of damage. Root crops including: beets, carrots, potatoes and turnips can be left in the ground beneath a layer of mulch after the leaves die back from frost. They can be harvested as needed until the soil begins to freeze in late November to December. (Cynthia Domenghini)