Answer: Your Dragon Wing begonias are tuberous begonias and you can store the tubers over the winter months, much like you would store dahlia tubers. Here's how:
Lift mature plants carefully before hard frosts in the fall. Cut back most of the top, leaving the ball of roots and soil intact. Place in a dry, cool storage area (basement or garage) and allow the tubers to cure for several weeks. After curing, shake off the soil and remove the remaining stalks and roots. Any portion of the stalk that is left may rot, and this could kill the entire tuber.
Store tubers by placing them on screen trays or by packing them in dry peat, sand, or insulating material. A dry, dark, cool storage area is best.
You can start plants in the spring by placing the tubers on damp peat moss and giving them warm temperatures. When roots and tops have started, plant them in small pots or in an outside bed when danger of frost is past.
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