There are 2 types of begonia, wax and tuberous. Both can be kept going inside during winter if desired. If you prefer dormancy, let the potting soil dry out completely then put the pot in a cool, dark place. If you have tuberous begonia, another option is to remove the tuber from the soil. Prune off the stems and roots and let the tuber dry at room temp for about a week. (I often dust mine with garden sulphur.) Store the tubers in peat moss. https://www.gardeningknowhow.com/ornamental/flowers/begonia/wintering-begonias-overwintering-a-begonia-in-cold-climates.htm
Answered on October 19, 2018
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