Begonias are native to South and Central America and have more than 1,000 known species. These perennial flowers do not handle freezing temperatures and need a little extra care to survive winter time. This is especially true in northern climates where temperatures can drop below freezing for long periods at a time.
Dig up your begonia in late fall after the foliage dies or after the first frost. Use a hand trowel to carefully dig out around the base of the plant and gently lift it out of the ground.
Place the plant on newspapers in a sunny, dry location. Allow it to dry thoroughly for one week. The plant must not get wet.
Cut all remaining foliage back 1-inch from the base of the roots or tubers. Shake off excess soil.
Place the tubers in a paper bag and fold over the top of the bag to seal it. Set the paper bag in a cool, dark, dry place such as a garage or basement. If storing more than one plant or set of tubers, place individual tubers into separate paper bags.
Re-plant the tubers in late spring or after the chance of the last frost has passed. They can also be planted into containers.