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Shrub Althaea, Rose of Sharon
Scientific Name: Hibiscus syriacus L.
Synonym: Ketmia arborea, Ketmia syriaca, Ketmia syrorum, Hibiscus acerifolius, Hibiscus floridus, Hibiscus rhombifolius
Family: Malvaceae
Shrub Althaea, Rose of Sharon (Hibiscus  syriacus) Recommended Temperature Zone:
sunset: 2-21, 26,28-41
USDA: 7-10a

Frost Tolerance: Mostly deciduous in Phoenix

Heat Tolerance: Afternoon shade in the hot areas

Sun Exposure: Full sun to light shade

Origin: Pakistan

Growth Habits: Deciduous shrub to 10 feet tall (3 m), 6 feet in width (1.8 m), can be trained to have a single trunk; alternate, coarsely toothed, smooth leaves, often with 3 lobes, up to 3 inches long (7.5 cm), 1.6 inches wide (4 cm)

Watering Needs: Regular deep watering, some drought tolerance, needs good drainage, prefers soil with added organic matter

Propagation: Softwood cuttings in spring, semi-hardwood in summer, hardwood cutting in winter without leaves, seeds, layering of the lower flexible branches

Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 526.

Cultural Practices:
Cutting it back in the fall, makes it give larger-sized flowers.

Blooming Habits:
The simple or double flowers in summers are bigger (up to 4 inches 10 cm) if the bush has been trimmed in winter. Several new varieties, and most of the ones with double flowers, do not set seeds, and thus, avoid the unattractive looking seed pods.

Fruiting Habits:

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Desert-Tropicals is dedicated to provide gardening advice, gardening ideas, and information about flower of all kind for landscape and collections. We try to check carefully the identification of the plants on the illustrations as well as the other information from the page, but occasionally errors do occur. if you notice anything that needs to be changed please contact us. Thanks.

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