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Rose of Sharon, Shrub Althea 'Ardens'

Hibiscus syriacus

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: syriacus (seer-ee-AK-us) (Info)
Cultivar: Ardens
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8-10 ft. (2.4-3 m)


Unknown - Tell us


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)

Sun Exposure:

Sun to Partial Shade

Bloom Color:


Bloom Time:

Mid Summer

Late Summer/Early Fall


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Other details:

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Soil pH requirements:

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Patent Information:

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Propagation Methods:

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Seed Collecting:

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Foliage Color:

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Bloom Characteristics:

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Water Requirements:

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Where to Grow:

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This plant has been said to grow in the following regions:

Bessemer, Alabama

Rincon, Georgia

Cedar Hill, Texas

Dallas, Texas

North Zulch, Texas

Goldendale, Washington

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Gardeners' Notes:

No details have been posted.