Shade-loving trailing begonias (Begonia spp) are ideal for containers, window boxes and hanging baskets. In subfreezing winter climates, they flower from early summer until the first frost. Lift their frost-tender bulbs in the fall for indoor overwintering and spring replanting.
Lifting The Plant
Trailing begonia's leaves and stems will wilt and die within a few days of the first killing frost. Dig around the plant with a spade. Carefully lift the entire plant, leaving a small amount of soil on the bulb's roots.
Curing the Bulb
Cut the foliage and all but 1 inch of stem. Place the bulb in a dark, cool location. Allow it to dry for two to three weeks.
Cleaning the Bulb
Remove the soil from the cured bulb. Cut off the roots and stem remnant. Dust the bulb with fungicide powder. Ensure complete coverage by pouring the fungicide powder into a paper bag. Add the bulb and shake the bag well.
Storing the Bulb
Cover the dusted bulb in vermiculite or dry peat moss. Store it at 4.44 to 10 degrees Celsius. Replant it when the soil warms in spring.
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