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Hibiscus syriacus Shintaeyang - Rose of Sharon

Hibiscus syriacus Shintaeyang
Common Hibiscus, Rose of Sharon, Syrian ketmia, St Joseph's rod, Garden Hibiscus

5,0/5
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Hello, I planted this young plant in autumn. I am in Brittany. This winter, we had two episodes of frost down to -4. During the first episode, I did not protect the spike of the plant and during the second episode, I had put hay and cut herb around the spike. Today, on 18th March, I notice small green shoots growing on the stems!!!!!!!!!!!!!!

Fanny, 18/03/2023

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This plant carries a 24 months recovery warranty

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Value-for-money
This althaea with single and bicoloured flowers, white with a splatter of cherry-red at the heart, possesses a charm with tropical accents. Enchanting, it produces large flowers throughout the summer, similar to those of single hollyhocks, that are short-lived but constantly renewed. A bit stiff when young, this deciduous shrub fills out over time and eventually forms a fabulous and very floriferous shrub. In a flowering hedge, a border, or a large container near the house, it is easy to cultivate in the sun and adapts to any ordinary well-drained, or even slightly chalky, soil.
Flower size
8 cm
Height at maturity
2.50 m
Spread at maturity
1.50 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Dry soil, Moist soil
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Best planting time March, October
Recommended planting time February to May, September to November
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Flowering time August to October
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Description

Hibiscus syriacus 'Shintaeyang', also known as Tree Mallow or Althaea, has a charm with tropical accents. Its single, bicoloured flower displays pure white petals, with a cherry-red splashed base that extends into short filaments. Enchanting, this deciduous shrub produces large flowers throughout the summer, similar to hollyhocks, that are short-lived but constantly renewed. A bit stiff in its youth, this variety becomes more bushy over time and forms a fabulous, very floriferous shrub. Whether in a flowering hedge, flower bed, or large container near the house, it is easy to grow in the sun and adapts to any well-drained, ordinary or even slightly chalky soil.

Hibiscus syriacus, sometimes called Rose Mallow, is a hardy shrub, deciduous in colder climates but evergreen in warm climates, belonging to the Malvaceae family, just like hollyhocks and marsh mallows. It is native to temperate regions of Asia and has given rise to numerous cultivars, including the 'Shintaeyang' variety, which stands out for its upright growth and abundant flowering from August to October. It is a shrub that reaches a height of 2 to 3 m (6 ft 7 in to 9 ft 10 in) and a spread of 1.5 to 2 m (4 ft 11 in to 6 ft 7 in), with an upright habit supported by an erect branching system and fairly slow growth. It produces large, single corollas in vibrant and contrasting white and red colours, surrounding a large central column of fused white stamens. Its foliage forms a beautiful dark background, of slightly glossy dark green. The leaves are alternate, lobed, and ovate to lanceolate, with dentate and undulate margins.

Rose Mallows have the advantage of flowering abundantly at a time when few shrubs are in bloom in the garden, in almost all soils and climates. 'Shintaeyang' Althaea thrives in bright, warm exposures. This hibiscus requires little maintenance and grows slowly but steadily. Plant it in a sheltered location away from strong winds, in a soil that remains slightly moist until the end of summer. This highly colourful but uncommon variety in our gardens can be used as a medium-sized hedge, in combination with other hibiscus varieties of different colours, or buddleias and abelias, as well as in isolation or at the back of a perennial flower bed composed of asters, phlox, daylilies, gauras, or shrubby mallows, for example.

Hibiscus syriacus Shintaeyang - Rose of Sharon in pictures

Hibiscus syriacus Shintaeyang - Rose of Sharon (Flowering) Flowering
Hibiscus syriacus Shintaeyang - Rose of Sharon (Foliage) Foliage

Plant habit

Height at maturity 2.50 m
Spread at maturity 1.50 m
Habit spreading
Growth rate slow

Flowering

Flower colour multicoloured
Flowering time August to October
Inflorescence Solitary
Flower size 8 cm

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Hibiscus

Species

syriacus

Cultivar

Shintaeyang

Family

Malvaceae

Other common names

Common Hibiscus, Rose of Sharon, Syrian ketmia, St Joseph's rod, Garden Hibiscus

Origin

Cultivar or hybrid

Product reference8133811

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Planting and care

Plant Hibiscus syriacus in spring or autumn, in a sunny position and in a well-drained, loose, but fertile soil. Dig a nice deep planting hole, add some compost and sand to your garden soil to improve soil quality if necessary. Water thoroughly after planting. Don't worry if the vegetation doesn't start before May: it's completely normal for this shrub.

While althaeas tolerate heat and occasionally dry soils, they are more beautiful and more floriferous in a soil that retains moisture in summer. Mulch the base of these shrubs if needed.

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Planting period

Best planting time March, October
Recommended planting time February to May, September to November

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Back of border, Hedge
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Neutral, Calcareous
Soil type Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light)
Soil moisture Dry soil, Moist soil, draining

Care

Pruning instructions Pruning takes place at the end of winter and must be hard to promote abundant flowering: cut to 3 to 5 buds above the ground. Always choose to cut above an eye facing outwards.
Pruning Pruning recommended once a year
Pruning time March
Soil moisture Dry soil, Moist soil
Disease resistance Good
Overwinter Can be left in the ground
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