To keep coleus over winter, you can either bring the plant indoors or take cuttings. If you choose to bring the plant indoors, place it in a bright location away from drafts. Reduce watering and fertilizing during the winter months. If you prefer to take cuttings, follow the same propagation steps mentioned earlier. Place the cuttings in water or soil, and keep them in a warm, well-lit area until they develop roots. Then, you can grow them indoors until spring or transplant them back outside.