Care for a hibiscus plant in the winter by pruning the plant after the first frost and packing mulch around the base of the plant to protect the roots from the cold, advises the San Francisco Chronicle. Bring any potted hibiscus plants indoors.
Once winter approaches, prune the plant to prevent it from growing during warm periods, says the San Francisco Chronicle. Prune the hibiscus plant to the ground or prune it partially. If partially pruning the plant, cut it down to within 12 inches of the ground. If you have a potted plant, only prune it by 50 percent. Spray the remaining foliage with a hose to rid it of any pests.
After pruning the plant, mulch or wrap it to protect it from the cold, states the San Francisco Chronicle. For an outdoor plant, add an 8- to 12-inch layer of pine straw of leaf mulch to the ground over the roots. This protects the plant from extreme cold and keeps it from growing during the winter. Once you bring the potted plant indoors, place it in a spot with indirect sunlight, and give it less water. For an outside potted hibiscus, drape the plant with LED Christmas lights, and wrap it in a protective tarp.