How To Care Hibiscus Plant. Place your hibiscus plant in a sunny spot that gets at least 8 hours of direct sunlight every day. Depending on the heat wind and humidity in your environment your plant may need to be watered daily or even twice a day in extremely dry conditions.
In the winter you dont need to fertilize at all. Garden hibiscus should be fertilized about once every two weeks. Hardy hibiscus can develop fungal infections including rust leaf spot and botrytis blight.
Typically tropical hibiscus plants thrive best with one to two inches of water per week.
Go to your local garden center and purchase heavy frost cloths to cover your hibiscus plants with. Neither require any fertilizer during the winter months. Also if you plant hibiscus outdoors there should be some shelter from the wind to protect their delicate blooms. Water plants deeply and thoroughly if needed.