Hibiscus rosa-sinensis are native to Tropical Asia. Hibiscus plants are among the showiest of flowering shrubs, often reaching 30 feet in nature. Glossy foliage varies somewhat in size and texture depending on variety.
Blooming Time: Summer. Flowers are 4-8 inches wide, may be single or double. Colors range from white through pink to red, from yellow and apricot to orange depending on variety.
Culture: Hibiscus rosa-sinensis need a well-drained compost consisting of 2 parts peat moss to 2 parts loam to 1 part sand. The plants need full sun to partial shade with intermediate to warm temperatures. Water the plants freely during the growing season. Fertilize the plants twice monthly with a balanced fertilizer from April through September. To keep mature plants growing vigorously, prune out about 1/3 of the old wood in spring. Pinching out tips of stems in spring and summer increases flower production. They may be grown outside in zone 7, but should be treated as annuals then.
Propagation: Hibiscus rosa-sinensis are propagated by cuttings, layering or grafting in spring. They can also be grown from seeds, but usually do not come true from seed.
Hibiscus rosa-sinensis was featured as Plant of the Week March 10-16, 2000.
Guide to Past Plants-of-the-Week:
Cal's Plant of the Week was provided as a service by the University of Oklahoma Department of Microbiology & Plant Biology and specifically the late Cal Lemke, who used to be OU's botany greenhouse grower and an avid gardener at home as well. If the above links don't work, then try the overview site. You may also like to look at the thumbnail index. ©1998-2012 All rights reserved.