Hardy Hibiscus can be grown in hardiness zones 5A to 10B which means they can stand cold temperatures from -20 degrees Fahrenheit to 35 degrees Fahrenheit. Once established they require only minimal watering.
The hardy Hibiscus is available in many colors from the brightest red to the deepest white. Some have different colored centers. Most centers are a deep ruby red or deep pink.
The Hibiscus is a tall plant growing to a height of 4 to 6 feet with a spread of 2 to 3 feet. When planting more than one of these beautiful plants space them at least two feet apart for the best air circulation.
Propagation of the hardy or perennial Hibiscus is by gathering the seeds, taking stem cuttings or by dividing the root ball. To collect the seeds, let the large seed pod dry completely then break open the pod and remove the seeds. Seeds can be started outdoors when the earth has warmed or started indoors 4 to 6 weeks before the last frost.