Answer: Tuberous begonias need to go through a resting period before they can bloom again. Wait until the stems have fallen off the plant on their own, then lift the tuber, shake off dirt, dry the tuber in the sun for 3 days, and store in a cool dark place such as a garage. When little pink buds become visible in the spring, plant them in pots and begin watering them. <br><br>Wax begonias can be grown as a houseplant over the winter. Simply place them in a bright spot, keep soil reasonably moist, and they will continue to grow and flower all winter. You can trim them back anytime--they are vigorous growers.
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