Rose of Sharon 'Diana' (Hibiscus syriacus): Pure White Sterile Blooms

Overview

Hibiscus syriacus 'Diana' is a Rose of Sharon (Shrub Althea) cultivar prized for its large, pure white, sterile flowers that bloom over a long season without setting seed.

Key Characteristics

• Family: Malvaceae
• Genus: Hibiscus
• Species: syriacus
• Cultivar: Diana

Features

This deciduous shrub grows 8–10 feet tall and 6–8 feet wide. The flowers are 4–5 inches, pure white with a waxy texture, and lack the typical red eye. Because they are sterile, they don't produce seed pods, extending the bloom period from summer to fall. Foliage is clean, dark green.

Garden Uses

Excellent as a specimen, hedge, or screen. The long bloom season and clean habit make it low maintenance. Very cold hardy (zones 5–9). Adaptable to various soils. Prune in late winter.