Answer: Unfortunately this can be a difficult plant to overwinter indoors. If you bring them in, you can provide them with light and try to keep them actively growing or else let them rest for the winter. To keep them growing, provide a very bright location with direct sun and cool room temperature (say 55 degrees.) Bring them in before temperatures drop into the 40's.
Or, to let them rest, put them in a spot with temperatures above freezing but no warmer than about 45 degrees. It can be dark, such as a basement or garage. Keep the soil just barely damp, not bone dry, and do not fertilize while they are resting. Take them back outside in the spring when temperatures are consistently above 45 so they can wake up naturally with the season.
Either way, you can prune them now or in the early spring.
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