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Hibiscus syriacus Purple Pillar - Rose of Sharon

Hibiscus syriacus PURPLE PILLAR PBR
Common Hibiscus, Rose of Sharon, Syrian ketmia, St Joseph's rod, Garden Hibiscus

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The Hibiscus syriacus Purple Pillar is a variety of plant that blooms abundantly and for a long time during summer. It has large semi-double corollas bicoloured in mauve with a purple heart, making it look beautiful. The plant can grow as tall as 4m (13 ft 1 in) and has a slim, columnar habit, which makes it perfect for creating a hedge. It can grow comfortably in all types of gardens, even in small ones. It's also suitable for growing in containers on a terrace. This bush is hardy and easy to grow as it adapts to most soils. To enjoy its stunning blooms, plant it in a sunny spot.
Flower size
9 cm
Height at maturity
4 m
Spread at maturity
90 cm
Exposure
Sun
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time July to September
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Description

The Hibiscus syriacus 'Purple Pillar' is a variety with a very upright and narrow habit, which can be grown in pots, hedges, or borders. Throughout the summer, it is adorned with beautiful semi-double flowers in a lovely mauve pink with a purple heart. Its unique columnar habit makes it an aesthetic and suitable plant for any garden, even small ones. Very hardy, tolerating most soils that are not too dry, this bush grows in the sun, but does not tolerate cold winter winds. Very easy to grow, it is an excellent choice, one of the best summer-flowering shrubs. 

The Hibiscus syriacus, sometimes called Rose of Sharon, is a hardy, deciduous shrub in our climate, but its foliage remains evergreen in winter in warm climates. It belongs to the Malvaceae family, along with lavateras, hollyhocks, and marshmallows. It is native to temperate regions of Asia (Korea, China, India) and has given rise to numerous cultivars that are hardier and more floriferous than ever!

'Purple Pillar' (synonym 'Gandini Santiago') is a particularly original variety due to its very narrow upright habit, which distinguishes it from classic Rose of Sharon. This bush can reach up to 4 metres (13 feet 1 inches) in height if not pruned, without exceeding 90 cm (35.4 in) in width. This allows it to be used as a hedge, and since it is recommended to prune it severely every year, it can also be grown in a pot to decorate a terrace. Its columnar habit, slightly conical, is particularly graphic. Its beautiful bright green foliage, composed of small leaves, provides a beautiful setting for its absolutely charming flowering. From July to September, it produces short-lived flowers that are quickly replaced with more, adorned with a purple heart on a mauve pink background. Semi-double, they have a slightly wrinkled and romantic appearance, evoking the lightness of crepe paper decorations. Distributed throughout the height of the bush, they justify its name "Purple Pillar". In autumn, when the flowering finally stops, the deciduous foliage becomes decorative, turning yellow before falling.


Despite its exotic appearance, it is very resistant to cold (down to -20°C) and very easy to grow. Preferring full sun, or partial shade in warm climates, it adapts to most soils, even limestone, except for those that are too wet or too dry.  

With its distinctly columnar habit, the 'Purple Pillar' Hibiscus is well suited for creating medium-sized hedges. It can be planted alongside Forsythias, whose bright yellow flowering replaces the often timid blooms early in the season. In spring, the flowering of Weigelas will provide a spectacle, and by opting for a variety of purple foliage like Weigela florida Alexandra, you can enjoy a pleasant contrast of foliage throughout the season. The little-known Buddleia alternifolia, with its delicately arching branches covered in lilac pink flowers spirally arranged, will then transition to the flowering of our Hibiscus. Finally, the classic but irreplaceable Callicarpa bodinieri Profusion will close the season with its autumn colours and many small decorative fruits throughout winter.

Hibiscus syriacus Purple Pillar - Rose of Sharon in pictures

Hibiscus syriacus Purple Pillar - Rose of Sharon (Flowering) Flowering
Hibiscus syriacus Purple Pillar - Rose of Sharon (Foliage) Foliage
Hibiscus syriacus Purple Pillar - Rose of Sharon (Plant habit) Plant habit

Plant habit

Height at maturity 4 m
Spread at maturity 90 cm
Habit upright, columnar
Growth rate normal

Flowering

Flower colour mauve
Flowering time July to September
Inflorescence Solitary
Flower size 9 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Hibiscus

Species

syriacus

Cultivar

PURPLE PILLAR PBR

Family

Malvaceae

Other common names

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

Origin

Cultivar or hybrid

Product reference1002541

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Planting and care

If you plan to plant a 'Purple Pillar' Hibiscus, choose a sunny spot in spring or autumn. If you live in a warmer climate, partial shade is suitable. The soil should be deep, well-drained and fertile. If it needs improvement, add compost and sand. After planting, water it well. It's normal for the bush to start growing vegetation in May. A mature plant can withstand temperatures as low as -20°C. This bush grows everywhere except in the mountains or very cold areas during winter.

Shrub Hibiscus can handle heat and occasional dry soil, but it's best to grow them in soil that retains moisture during summer. If necessary, add mulch around the base of the plants and water them when needed. If you prefer to grow this narrow-growing variety in a container, prune it yearly at the end of winter to limit its height.

Planting period

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

Intended location

Suitable for Meadow
Type of use Border, Free-standing, Container, Hedge
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun
Soil pH Any
Soil type Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light)
Soil moisture Moist soil, deep, loose, fertile

Care

Pruning instructions The best time to prune is at the end of winter. Prune severely to promote abundant flowering, cutting to 3-5 buds above ground level. Always make cuts above an outward-facing bud.
Pruning Pruning recommended once a year
Pruning time March
Soil moisture Moist soil
Disease resistance Good
Overwinter Can be left in the ground

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