Hibiscus rosa-sinensis 'Red Semi-Double' (Red Double Hibiscus)

The Hibiscus request frequent deep watering, but good drainage. It is sensitive to root rot if the ground stays soaked. Check regularly for aphids and mealy bugs, and fertilize.The flowers last only a day or two, but they are produced in abundance most of the year. More pictures of different varieties: Hibiscus page and Catalog of Fancy varieties

Read more about hibiscus:
Hibiscus growing tips: The Tips of Hibiscus Flowers
Most useful Hibiscus plants
Hibiscus: TopTropicals' first plant
Catalog of Fancy Hibiscus varieties
Hibiscus Varieties Gallery

Hibiscus rosa-sinensis 'Red Semi-Double' (Red Semi-Double Hibiscus) is a tropical variety distinguished by its vivid red blooms that are partly double, revealing a bright central column of stamens framed by softly ruffled petals. Each flower measures about 4 inches across and glows with a deep scarlet tone that remains rich and consistent even in full sunlight. The blooms appear in generous succession through the warm season, standing out vividly against the glossy dark-green foliage. The plant forms a compact, rounded shrub that maintains an elegant balance between strong growth and continuous flowering.

This variety performs well in tropical and subtropical climates and can bloom nearly year-round in frost-free conditions. It thrives in full sun and well-drained, fertile soil with regular watering and monthly feeding during the growing season. Well suited for garden borders, patio containers, or accent plantings, 'Red Semi-Double' combines reliable performance with timeless tropical beauty. Plants grow best in USDA Zones 9-11 and need protection from frost, with minimum tolerance down to about 35F. It is often referred to as H. Althea, H. Amplissimus (referring to double flower), and Double Rose of Sharon. This variety is also known under names: Red Hot, President, Red Dragon, Super Red.