Step 1: Transition to new location and monitor for insects. Bring them 
into your garage, three-season patio, or an indoor room away from other houseplants. Keep them isolated for several weeks. Check for insects and, where applicable, use insecticidal soap to treat any mites and aphids. Handpick and destroy larger caterpillars, slugs, earwigs and beetles.
Step 2: Move plants indoors to a warm, sunny location. Locations may include a south-facing window, three-season patio, or atrium. If you wish, you can enhance lighting conditions with an artificial light.
Step 3: Water and prune. Water thoroughly whenever the top few inches of soil start to dry. Hold off fertilizing until the plants adjust to their new surroundings and show signs of growth. Prune only enough to fit the plants into their winter locations. Don’t worry about falling leaves, the plants will replace the leaves once they adjust.
Step 4: Continue to care for and enjoy! Water as needed throughout winter and continually monitor for pests. Enjoy the greenery and occasional flowers. Prune overgrown plants in late February.
Source: Myers, Melinda. Month by Month Gardening in Wisconsin: What to Do Each Month to Have a Beautiful Garden All Year. Franklin: Cool Springs, 2006. Print.
