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Hibiscus syriacus Sup’Bridge® - Rose of Sharon

Hibiscus syriacus ‘Minsyrou17’ Sup’Bridge®
Common Hibiscus, Rose of Sharon, Syrian ketmia, St Joseph's rod, Garden Hibiscus

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Sup’Bridge is a floriferous and vigorous hibiscus, derived from the famous Woodbridge variety. All summer long, it is covered with large purplish-red flowers with a dark red heart. Hardy to −20 °C, this shrub grows in full sun in ordinary, even chalky, but well-drained soil. Once established, it tolerates drought and is well-suited to urban conditions.
Flower size
11 cm
Height at maturity
2 m
Spread at maturity
1.50 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -20.5°C
Soil moisture
Dry soil, Moist soil
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Best planting time March, October
Recommended planting time March to May, September to November
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Flowering time July to October
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Description

Hibiscus syriacus 'Sup’Bridge' ‘Minsyrou17’ is an improvement on the famous rose of Sharon 'Woodbridge'. This vigorous, deciduous shrub produces large purple-red flowers with a burgundy centre, which bloom generously from summer until the first frosts. Hardy and undemanding, it adapts to many climates and withstands urban conditions well. To enjoy a generous flowering, plant it in the sun in well-drained soil and prune it lightly at the end of winter. 

Hibiscus syriacus Sup’Bridge belongs to the Malvaceae family and is known by the common names rose of Sharon, Syrian hibiscus, or tree mallow. This cultivar is registered under the names Hibiscus syriacus ‘Sup’Bridge’®, ‘Minsyrou17’, or Hibiscus syriacus 'Paraplu Rouge'. Originating from a breeding programme led by Hortival Diffusion (France) in 2019, this cultivar improves upon the variety ‘Woodbridge’ by offering more vigorous growth, a more compact branch system, more abundant flowering and larger flowers of a deeper purple-red. 

The habit of Sup’Bridge is erect, branched and dense; its growth is medium to fast; it reaches 1.50 to 2m in height and 1 to 1.50m in width after 10 years. The foliage is deciduous, composed of alternate, dark green leaves with three coarsely toothed lobes, measuring about 6 to 10 cm in length. The large single flowers with five petals measure 10 to 12 cm in diameter. They are a dark purple to deep pinkish-red colour with a burgundy central eye and prominent pale yellow stamens. Each ephemeral flower lasts about a day, but the plant, which produces them continuously, puts on a generous show between early July and October, or even November, depending on the climate. The root system is taprooted and moderately running, sturdy but not invasive, suitable for container cultivation. This variety completely loses its foliage in winter. It tolerates temperatures down to −20 °C (USDA zone 6), prefers full sun, tolerates chalky soils and withstands moderate summer drought. 

Rose of Sharon 'Sup’Bridge' is a very beautiful shrub for a sunny garden, whether placed as a specimen, in the centre of a border or in a flowering hedge. Its generous flowering enlivens summer scenes and pairs wonderfully with white hibiscus, perovskias and artemisia 'Powis Castle' with its silver foliage. In a container on the patio, it becomes a small, architectural, colourful tree, perfect for a Mediterranean atmosphere. Also, combine it with small-leaved salvias or agapanthus to create a bright and long-lasting palette. In a more classic garden, it goes well with repeat-flowering shrub roses.

Tip: In regions with very dry summers, water your hibiscus regularly to support its flowering.

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Hibiscus, Althaea: planting, growing and care
Family sheet
by Valérie 13 min.
Hibiscus, Althaea: planting, growing and care
Read article

Hibiscus syriacus Sup’Bridge® - Rose of Sharon in pictures

Hibiscus syriacus Sup’Bridge® - Rose of Sharon (Flowering) Flowering

Plant habit

Height at maturity 2 m
Spread at maturity 1.50 m
Habit spreading
Growth rate normal

Flowering

Flower colour red
Flowering time July to October
Inflorescence Solitary
Flower size 11 cm
Fruit colour green

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Hibiscus

Species

syriacus

Cultivar

‘Minsyrou17’ Sup’Bridge®

Family

Malvaceae

Other common names

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

Botanical synonyms

Hibiscus syriacus ‘Minsyrou17’ , Hibiscus syriacus Sup Bridge®, Hibiscus syriacus 'Paraplu Rouge'

Origin

Cultivar or hybrid

Product reference24786

Planting and care

Plant Hibiscus syriacus 'Sup'Bridge' in spring or autumn, in a sunny position, even partial shade in southern regions, in well-drained, fertile, deep soil. It tolerates lime well. Dig a deep planting hole, and add some potting compost to your garden soil to improve soil quality if necessary. Water thoroughly after planting, then regularly if the summer is dry during the first 2-3 years. Do not worry if growth does not start before May; this is perfectly normal for this shrub.

Hibiscus syriacus tolerates heat and occasionally dry soils, but will be more beautiful and more floriferous in soil that retains moisture in summer. Mulch the base of these generous shrubs if necessary.

Planting period

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

Intended location

Suitable for Meadow
Type of use Border, Free-standing, Small gardens, Container, Hedge
Hardiness Hardy down to -20.5°C (USDA zone 6b) Show map
Ease of cultivation Beginner
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 Ordinary, well-drained soil

Care

Pruning instructions Prune at the end of winter; Prune hard to encourage abundant flowering. Cut back to 3 to 5 buds above the soil. Always cut above an outward-facing bud.
Pruning Pruning recommended once a year
Pruning time March
Soil moisture Dry soil, Moist soil
Disease resistance Very good
Overwinter Can be left in the ground

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