Hibiscus syriacus
Overview
The Rose of Sharon is a small flowering tree or large shrub prized for its colorful late-summer blooms and adaptability to a wide range of landscape conditions. Native to eastern Asia, it has been cultivated for centuries and is widely planted throughout North America as an ornamental.
Unlike many flowering trees that bloom in spring, Rose of Sharon produces abundant flowers during mid- and late summer when relatively few woody plants are in bloom. Its long flowering period, variety of flower colors, and tolerance of urban environments have made it a popular feature in gardens, campuses, parks, and residential landscapes.
Identification
Leaves
- Alternate leaf arrangement
- Oval to diamond-shaped leaves
- Coarsely toothed margins
- Medium to dark green during the growing season
- Yellow fall color, often modest
Bark
- Gray-brown bark
- Smooth on younger stems
- Develops shallow ridges with age
- Often forms multiple trunks
Flowers
- Large, showy blossoms
- White, pink, lavender, purple, blue, or bicolored depending on cultivar
- Typically 2 to 4 inches across
- Bloom from mid-summer into early autumn
- Attractive to pollinators
Fruit
- Small brown seed capsules
- Persist into autumn and winter
- Split open to release numerous seeds
Size
- Typically grows 8 to 15 feet tall
- Mature spread of 6 to 12 feet
- Often develops a vase-shaped or upright form
Native Range
Rose of Sharon is native to China and Korea. It has been cultivated throughout Asia and Europe for centuries and is now widely planted across North America because of its ornamental value and adaptability.
Within the Marshall University Arboretum, Rose of Sharon is classified as a Non-Native species.
Ecology and Wildlife Value
Rose of Sharon provides important late-season resources for pollinators.
Its flowers attract:
- Native bees
- Bumblebees
- Butterflies
- Hummingbirds
- Other pollinating insects
The plant also provides:
- Seasonal cover for birds
- Nectar during the summer flowering season
- Structural diversity within the landscape
In some regions, Rose of Sharon can self-seed readily and spread beyond planted areas.
Human Uses and Cultural Significance
Rose of Sharon has long been cultivated for its ornamental beauty.
The species is valued for:
- Long flowering season
- Large colorful blossoms
- Adaptability to urban environments
- Drought tolerance
- Compact size
Hundreds of cultivars have been developed with variations in flower color, petal arrangement, and growth habit.
Because it blooms during the hottest part of the growing season, Rose of Sharon is often planted to extend seasonal interest in gardens and landscapes.
Rose of Sharon at Marshall University
Rose of Sharon contributes vibrant summer color and pollinator resources to the Marshall University Arboretum. Its extended bloom period provides floral interest well after many spring-flowering trees and shrubs have finished flowering.
As a non-native ornamental species, Rose of Sharon illustrates how cultivated flowering plants from around the world can contribute beauty and seasonal diversity to the campus landscape.
Quick Facts
Common Name: Rose of Sharon
Scientific Name: Hibiscus syriacus
Family: Malvaceae
Native Region: Non-Native
Mature Height: 8–15 feet
Mature Spread: 6–12 feet
Growth Rate: Moderate
Sun Requirements: Full Sun
Soil Preferences: Well-drained soils; adaptable to a variety of conditions
USDA Hardiness Zones: 5–9
Bloom Period: July to September
Fruit/Seed: Brown seed capsules that mature in autumn
Wildlife Value: Supports pollinators, including bees, butterflies, and hummingbirds
Notable Characteristics: Large colorful flowers, long bloom season, and adaptability to urban landscapes