Red Hibiscus

Red Hibiscus represents Hibiscus ‘Rubrum’, an old sterile hybrid between the woody Asian Hibiscus mutabilis and perennial North American Hibiscus moscheutos. In mild climates it forms an eight-foot shrub about six feet wide; in colder gardens it can die back and regrow to similar height, with bright cherry-red flower clusters from July into October. ### Garden display This tall hibiscus brings a late-season red display to a sunny garden, pollinator planting, or large container. Plant Delights describes the named selection as a hybrid, not a form of H. mutabilis, and lists USDA Zones 7b–10b. Its account also distinguishes woody growth in mild climates from seasonal dieback in colder gardens. [Plant Delights’ Hibiscus ‘Rubrum’ profile](https://www.plantdelights.com/products/hibiscus-rubrum) documents the selection, 8-by-6-foot mature size, flowering period, and garden culture. ### Growing conditions Give the plant sun and average-to-moist soil. Its substantial height and spread require room for the mature clump, while its seasonal dieback can make it useful in colder landscapes where the root system survives. ## Maintenance Maintain even moisture through active growth and allow the plant to enter winter dormancy. In climates where the stems die back, wait for new shoots before removing old growth.