Scarlet Hibiscus

Scarlet Hibiscus (Hibiscus coccineus)

Common Names: Scarlet Hibiscus, Swamp Hibiscus, Texas Star Hibiscus.

Best Growing Environment: Scarlet Hibiscus is native to the southeastern United States, particularly the wetlands and swampy areas of Florida and Georgia. Its natural habitat provides a clue to its ideal growing conditions. It thrives in moist to wet soils and is frequently found near ponds, streams, or other water bodies. This plant is tolerant of temporary flooding, making it a great choice for rain gardens or wetland restoration projects.

Average Height and Diameter: The Scarlet Hibiscus typically reaches heights between 4 to 7 feet tall, although under ideal conditions, it can stretch up to 8 feet. It boasts a spread or diameter of about 2 to 3 feet.

Growth Rate: This perennial herbaceous plant exhibits a moderate growth rate.

Sun Requirements: Scarlet Hibiscus prefers full sun for optimal growth and flower production. It can tolerate partial shade, but this might lead to reduced flowering.

Cold Hardiness: The Scarlet Hibiscus is suited for USDA zones 6-9. While it is relatively cold hardy, it may die back to the ground in winter in the cooler end of its range but generally sprouts back in the spring.

Water Requirements: As its natural habitat suggests, Scarlet Hibiscus enjoys consistent moisture. While it can withstand some drought once established, it prefers wet to consistently moist soil.

Fertilizing Guide: While the Scarlet Hibiscus is not particularly demanding, it can benefit from a balanced, slow-release fertilizer applied in early spring to stimulate growth and flowering. Be cautious with high-nitrogen fertilizers, as they may promote leafy growth at the expense of blooms.

Planting Guide: Choose a location that mimics its natural habitat – a wet or consistently moist area with full sun. Dig a hole twice as wide as the root ball and just as deep. Position the plant so that its root ball is level with or slightly above the soil surface. Refill the hole, pressing down gently to eliminate air pockets. Water deeply. If planting multiple specimens, ensure they are spaced about 3 feet apart.

USDA Zone: Ideally suited for USDA zones 6-9.

Scarlet Hibiscus is distinguished by its striking, star-shaped scarlet flowers, which bloom during the late summer and early fall. These vibrant blooms attract hummingbirds and butterflies, making it a delightful addition for gardens aiming to support wildlife. The deeply lobed, cannabis-like leaves are also an attractive feature. Its preference for wet conditions and the dramatic floral display makes the Scarlet Hibiscus a favorite among gardeners looking to add a splash of color to water gardens, pond edges, or other damp locations.