Hibiscus waimeae, commonly known as white Kauai rosemallow, is a small deciduous tree endemic to the island of Kauaʻi in Hawaii. It is found in mesic and wet forests at elevations ranging from 820 to 3937 feet. This species is notable for its smooth gray bark and its large, showy white flowers that bloom year-round and fade to pink within a day, emitting a pleasant fragrance. The flowers are particularly attractive to native pollinators. Hibiscus waimeae typically reaches a height of 20-33 feet with a moderate growth rate.

The white Kauai rosemallow is valued for its fragrant, ornamental flowers, which are used in leis and traditional Hawaiian decorations. It thrives in well-draining, fertile soils and requires regular watering, especially during dry periods. While it prefers full sun to part shade, it can tolerate a range of light conditions. The plant is relatively low-maintenance but can be susceptible to pests such as aphids and whiteflies. The endangered subspecies H. waimeae subsp. hannerae, which grows in the northwestern valleys of Kauaʻi, is recognized for its cultural significance and has been used by Native Hawaiians for both decorative and medicinal purposes. Gardeners should be aware that while the plant is not typically invasive, it is best suited to tropical and subtropical climates and may struggle in colder regions.CC BY-SA 4.0