How To Look After Hibiscus In Winter. Watering Tips for Care for Hibiscus in the Winter. If you water more than this you may damage the roots.
Feed the hibiscus plant with a potassium fertilizer in October or November to encourage profuse blooming the following year. To help them survive the cold cover the plants with a thick 8- to 12 inch layer of mulch. Place your hibiscus plant in a sunny spot that gets at least 8 hours of direct sunlight every day.
If a tropical hibiscus begins to lose its leaves or if it turns yellow continue to care for it normally.
They will not tolerate more than a night or two of light freezes. The first thing to remember about hibiscus winter care is that hibiscus in the winter will need less water than it does in the summer. Hardy hibiscus need very little care over the winter they are root hardy to about zone 5 with no protection. Winter hibiscus care is important for the health of the plant to keep it blooming year after year and looking its best.