Rose-of-Sharon or althea (Hibiscus syriacus)

USDA Hardiness Zones

USDA hardiness zones
Rose-of-Sharon or althea
Rose-of-Sharon or althea Rose-of-Sharon or althea Rose-of-Sharon or althea Rose-of-Sharon or althea
Rose-of-Sharon or althea (Hibiscus syriacus)
Zone Zone  more information
Hardy to zone 5b
Mature Height Mature Height
8 to 12 feet
Mature Spread Mature Spread
6 to 10 feet
Growth Rate Growth Rate
Slower
Sun Sun
Full Sun
Moisture Moisture
Moist soil, well drained
Fall Color Fall Color
Dull
Attracts Wildlife Attracts Wildlife
No
Flower Flower
Ornamental
Fruit Fruit
Insignificant
Evergreen Evergreen
No
Native to WI Native to WI
No
Additional Information Additional Information
upright to vase-shaped shrub; 8-12’ tall; 6-10’ wide; slow grower; coarse texture; no fall color; large, bell-shaped flowers in summer to fall; flower color comes in white, pink, red, purple, blue, lavender, or violet; each flower lasts only one day but produces new flowers each day; full sun; adaptable to most soils and pH; prefers moist, well-drained soil; heat and urban tolerant; susceptible to Japanese beetles and spider mites; do not shear; native to Asia; hardy to zone 5b; marginally hardy, plant in protected location

UW Extension
For more information, see the UW Extension Urban Horticulture Team Web site: www.uwex.edu/ces/wihort
Primary Author: Dr. Laura Jull
Photos by: Dr. Laura Jull and Dr. Ed Hasselkus

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