You can, or you could overwinter it outside in a sheltered location. It may also help to wrap the pot it's currently in with bubble wrap to help insulate the plant roots. When wintry weather is expected, adding a blanket over top can also help. Here is more information on overwintering begonia plants: https://www.gardeningknowhow.com/ornamental/flowers/begonia/wintering-begonias-overwintering-a-begonia-in-cold-climates.htm
Answered on September 12, 2015
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