Hibiscus grandiflorus Michx.
Swamp rosemallow, Swamp rose-mallow, Pink swamp hibiscus, Large-flowered hibiscus
Malvaceae (Mallow Family)
USDA Symbol: HIGR4
The five pink petals of swamp rose-mallow flowers each have a red to purple center, are 4-6 in. long, and surround many stamens. Flowers nod slightly from leaf axils and occur singly. Velvety, alternate leaves are heart-shaped, three-lobed, and toothed. Seed pods are also velvety. This shrub-like, herbaceous to somewhat woody plant grows to 6 ft. tall or more.
Swamp Hibiscus is a member of the mallow family (family Malvaceae) which includes herbs, shrubs, and rarely small trees, often velvety with starlike or branched hairs, the flowers borne singly or in branched clusters. There are about 85 genera and 1,500 species, many in tropical America. Rose-of-Sharon and other Hibiscus, and Hollyhocks are grown as ornamentals. Okra is the edible fruit of one species of Hibiscus, and the hairs of seeds of Gossypium provide the fiber cotton.
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Bloom InformationBloom Color: Red , Pink
Bloom Time: Mar , Apr , May , Jun , Jul , Aug
DistributionUSA: AL , FL , GA , LA , MS , TX
Native Distribution: GA & FL to s. MS
Native Habitat: Marshes; ditches; other wet, open areas
Growing ConditionsLight Requirement: Part Shade
Soil Moisture: Wet
Soil Description: Wet soils.
Conditions Comments: Not Available
BenefitConspicuous Flowers: yes
PropagationDescription: Easily grown from seed planted in the spring.
Seed Collection: Not Available
Seed Treatment: Not Available
Commercially Avail: yes
National Wetland Indicator Status
Research LiteratureReslit 2556 - Innovations in Hibiscus and Kosteletzkya (Malvaceae, Hibisceae) (2008) O. J. Blanchard
Reslit 2690 - Evaluation of twelve genotypes of Hibiscus for resistance to hibiscus sawfly, Atomacera decepta Rohwer (Hymenoptera: Argidae) (2004) D. W. Boyd Jr., C. L. Cheatham
Reslit 2692 - Meloidogyne spp. infecting ornamental plants in Florida (2010) J. A. Brito, R. Kaur, R. Cetintas, J. D. Stanley, ...
Reslit 2693 - Phylogeny of Hibiscus sect. Muenchhusia (Malvaceae) based on chloroplast rpL16 and ndhF, and nuclear ITS and GBSSI sequences (2004) R. L. Small
Reslit 2694 - Our hardy Hibiscus species as ornamentals (1970) H. F. Winters
This information was provided by the Florida WIldflower Foundation.
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Additional resourcesUSDA: Find Hibiscus grandiflorus in USDA Plants
FNA: Find Hibiscus grandiflorus in the Flora of North America (if available)
Google: Search Google for Hibiscus grandiflorus
MetadataRecord Modified: 2012-08-02
Research By: TWC Staff