Rose of Sharon, Shrub Althea 'Hamabo'

Hibiscussyriacus

Family
Malvaceae (mal-VAY-see-ee)
Genus
Hibiscus (hi-BIS-kus)
Species
syriacus (seer-ee-AK-us)
Synonym
Spacing
8-10 ft. (2.4-3 m)
Hardiness
4-6 ft. (1.2-1.8 m)
Sun Exposure
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Bloom Color
Sun to Partial Shade
Bloom Time
Foliage
Rose/Mauve
Maroon/Burgundy
Other Details
Other details
Mid Summer
Late Summer/Early Fall
Propagation Methods
Deciduous
Smooth
Seed Collecting
Soil pH requirements
From seed; direct sow outdoors in fall
From seed; stratify if sowing indoors
From seed; germinate in a damp paper towel
Patent Information
Foliage Color
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds
Bloom Characteristics
Water Requirements
Where to Grow
Regional

This plant is said to grow outdoors in the following regions:

Tuscaloosa, Alabama

Merced, California

Box Springs, Georgia

Calhoun, Georgia

Hampton, Illinois

Moline, Illinois

Attleboro, Massachusetts

Buffalo, New York

Cleveland, Ohio

Dundee, Ohio

Happy Valley, Oregon

Pittsburgh, Pennsylvania

Fort Worth, Texas

Falls Church, Virginia

Richmond, Virginia

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Gardener's Notes:

3
positives
0
neutral
0
negative
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G
Hampton, IL (Zone 5a) | May 2005 | positive

This ROS is a great bloomer and survives our zone 5 winters just fine.

B
Box Springs, GA | December 2004 | positive

This is a great plant to grow!It seems to love the heat that we have here,and doesn't need much water to grow.The flowers are huge,and a ...Read More

O
Dundee, OH (Zone 5b) | January 2004 | positive

I love how fast this shrub grows here for me, little seedlings that germinate one spring will flower for me in the second spring, often t...Read More

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