Bulbous plants such as cannas, dahlias, gladiolus, pineapple lilies and sweet potato vine may be just fine. Although their foliage has been frozen back, the bulbs themselves are likely firm. There's still time to store them indoors over winter.

Cut back the dead leaves. Dig the bulbs and store in loosely-tied plastic bags. If the bulbs are growing in pots, consider moving the whole pot inside. Store the bulbs in a dark, cool room where it doesn't freeze. Most people use their basements.

Every month or so, sprinkle a bit of water on the bulbs or water the pots to keep them from withering completely during the winter. Gladiolus can stay completely dry; they're best stored in mesh bags that produce is sold in at the supermarket.

Reactivate the bulbs in spring by moving them to a sunny window and resuming regular watering. They'll reward you by being stronger and bigger after a winter rest. Cannas may need to be divided. You'll save money by not needing to replace the bulbs in spring. You'll also get bigger, more impressive specimens by saving the bulbs from year to year.