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Hibiscus Rose Moon

Hibiscus syriacus x paramutabilis Rose Moon (WALHIROSMO)
Common Hibiscus, Rose of Sharon, Syrian ketmia, St Joseph's rod, Garden Hibiscus

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Lovely healthy plant and very well packaged.

Patrice, 25/03/2024

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This plant carries a 24 months recovery warranty

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Value-for-money
This hybrid hibiscus has inherited the large exotic flowers from its parent, Hibiscus paramutabilis. This beautiful bush with an upright habit produces large single flowers of 17 cm (6.7 in) throughout the summer, in a bright pink colour, stained with red at the throat, highlighted by a beautiful, glossy dark green foliage. It is just as floriferous, hardy, and easy to grow as its other parent, Althaea, and produces almost no fruits.
Flower size
17 cm
Height at maturity
2.75 m
Spread at maturity
1.80 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 April, September to November
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Flowering time July to October
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Description

Hibiscus Rose Moon is a new variety resulting from the cross-breeding of Hibiscus paramutabilis and Hibiscus syriacus, the Althaea which is more familiar to us. This large bush has inherited particularly large exotic flowers from its first parent as well as the hardiness and floribundity of the second. Throughout the summer, even on a young plant, very large single to semi-double flowers of a vivid pink colour, speckled with carmine red in the throat, succeed each other on a beautiful dark and glossy foliage. This hybrid, which produces almost no fruits, requires very little maintenance. In the garden, the bush proves to be sturdy and accommodating, easy to combine in a flowering hedge or a bed. Give it a sunny exposure and an ordinary, but deep, moist and well-drained soil.

The Hibiscus Walberton’s® Rose Moon (WALHIROSMO) is a recently selected horticultural variety in England. It is the result of a cross-breeding between Hibiscus syriacus, a perfectly hardy shrubby species originating from temperate regions of Asia, and H. paramutabilis, endemic to central China, and more developed. All these deciduous shrubs belong to the mallow family, just like hollyhocks and marsh mallows.

'Rose Moon' has a bushy and upright habit, slightly open and a bit loose, supported by thick and strong branches. Its growth is moderately fast: it can reach 3 m (9 ft 10 in) in height with a spread of 1.8 m (5 ft 10 in). It blooms from a young age and for a long time if the weather remains mild, and its short-lived flowers that fade within 24 hours are constantly renewed  from July until October at the end of the branches. Carried by pedicels 2 to 4 cm (0.8 to 1.6 in) long, they are single, solitary, 15 to 20 cm (5.9 to 7.9 in) wide, and composed of silky bright and fresh bluish-pink petals, arranged around a beautiful red-rose carmine throat. In the centre of the corolla sits a white column composed of stamens and pistil. This hybrid is almost sterile: it rarely produces fruits, in favour of a particularly generous flowering. Its foliage, deciduous and decorative, is dark green and glossy. The full leaves have a slightly toothed edge.

In the garden, Hibiscus Rose Moon requires the same growing conditions as Althaea and will serve the same purpose. It appreciates bright, warm exposures. This hibiscus requires no maintenance, and grows slowly but steadily in the first years. Plant it in a soil that remains slightly moist until the end of summer, even if it is limestone. It can be used in a medium-sized free hedge, in combination with other hibiscus of different colours, botanical roses, mock oranges,  lilacs and butterfly bushes which will provide the fragrance that it lacks. It can also be planted as a specimen or at the back of a perennial bed composed of daylilies, asters or shrubby salvias for example. 

Hibiscus Rose Moon in pictures

Hibiscus Rose Moon (Flowering) Flowering

Plant habit

Height at maturity 2.75 m
Spread at maturity 1.80 m
Habit spreading
Growth rate normal

Flowering

Flower colour pink
Flowering time July to October
Inflorescence Solitary
Flower size 17 cm

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Hibiscus

Species

syriacus x paramutabilis

Cultivar

Rose Moon (WALHIROSMO)

Family

Malvaceae

Other common names

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

Origin

Cultivar or hybrid

Product reference8501111

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Planting and care

Plant Hibiscus Rose Moon in spring or autumn, in a sunny position, in a well-drained, deep, loose, fertile soil that remains moist at depth. Dig a deep planting hole and add some compost and sand to your garden soil to improve soil quality if necessary. Water generously after planting. Don't worry if the vegetation doesn't start before May: it's completely normal for this bush. When mature, it is hardy down to around -20 °C (-4 °F).

While shrubby hibiscus can 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 generous bushes if needed and water if necessary.

1
7,50 € Bag

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, Back of border, Free-standing, 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, Deep, well-draining

Care

Pruning instructions Pruning takes place at the end of winter and should be hard to promote abundant flowering: cut to 3 to 5 buds above the ground. Always choose to cut above an eye facing outward.
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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