Rhododendron yakushimanum Caroline Allbrook
Rhododendron yakushimanum Caroline Allbrook
Rhododendron yakushimanum Caroline Allbrook
Rhododendron yakushimanum Caroline Allbrook
Rhododendron yakushimanum Caroline Allbrook
Rhododendron yakushimanum Caroline Allbrook
Rhododendron yakushimanum Caroline Allbrook
Yakushima Rhododendron, Yakushimanum Rhododendron
Hello, it's difficult to give an opinion as I haven't received the young plant.
Evelyne., 19/12/2023
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Description
Rhododendron 'Caroline Allbrook' is a particularly floriferous hybrid derived from the Japanese species yakushimanum, which has given it a compact habit. Its flowering in May-June is a feast for the eyes: clusters of violet buds open into campanulate and undulate flowers of magenta-pink colour, becoming pale pink over the days. The evergreen dark green foliage adorns its branches, whose sturdy architecture evokes Japanese art. A bright and romantic variety, perfect for easily enhancing a small shaded space in the garden.
Rhododendrons are plants of the Ericaceae family, just like heathers, preferring soils devoid of limestone, with an acidic tendency, and humid climates. The Rhododendron yakushimanum 'Caroline Allbrook' forms a dense bush, with a rounded habit of about 1.2m (4ft) in all directions at maturity. Its growth is rather slow, generally reaching 90cm (35in) at the age of 10. Its evergreen leaves, dark green and matte, are elliptical in shape and cover the plant well. They have a very velvety, reddish-brown underside. In May-June, its remarkably abundant flowering submerges the bush: grouped in corymbs, the violet flower buds open into large flowers, with silky and undulate petals on the edges, of a tender magenta pink, adorned with a very light yellow-green macule. Over time, the flowers fade to a very soft white-pink hue.
Like all yakushimanum hybrids, affectionately nicknamed "yak rhodos" by specialists, the Rhododendron 'Caroline Allbrook' is hardy to -15°C (5°F) or even -20°C (1°F). Although they prefer a semi-shaded exposure, these hybrids tolerate the sun as long as it is not scorching and their base remains moist. 'Caroline Allbrook', with its abundant and bright flowering, will easily enhance a small shaded space in the garden, alongside ferns, blue or variegated hostas, Pieris, heathers, Kalmias, Azaleas and Japanese Maples, or other rhododendrons from the same group to create superb patchworks of textures and colours in spring. Cultivation in pots requires regular watering with non-limestone water and specific fertilizer for acid-loving plants.
Rhododendron yakushimanum Caroline Allbrook in pictures
Plant habit
Flowering
Foliage
Botanical data
Rhododendron
yakushimanum
Caroline Allbrook
Ericaceae
Yakushima Rhododendron, Yakushimanum Rhododendron
Cultivar or hybrid
Planting and care
Plant Rhododendron yakushimanum 'Caroline Allbrook' in partial shade, protected from cold and drying winds, in a moist, humus-rich and light soil, with a tendency towards acidity or neutrality. Like all plants of the heather family, it does not tolerate chalky soils or heavy soils that become waterlogged in winter. If the soil remains moist in summer, this rhododendron will also tolerate non-scorching sun exposure.
Dig a hole with a volume three times larger than the pot. Soak the root ball in non-chalky water and plant the bush at the collar level, in a mixture composed of leaf compost, gravel or pumice stone, and loam. Water generously and keep the soil moist in summer. Azaleas and Rhododendrons have a shallow root system. Therefore, they dislike long periods of drought. That is why humus-enriched soil and abundant watering during dry periods are recommended. In addition, this root system is not very strong, which is why it is essential to lighten heavy soils with draining materials (gravel, pumice stone, clay pellets) at planting. Apply a mulch of shredded pine bark at the base of the bush every spring to maintain soil moisture while keeping an acidic pH.
Maintenance consists of removing faded flowers in summer and clearing the bush of dead branches. Azaleas and Rhododendrons can sometimes be attacked by weevils that eat the edge of the leaves and the rootlets, as well as by the famous "rhododendron beetle" which does not often cause severe damage. Effective biological solutions exist today against weevils. The yellowing of leaves (chlorosis) in Rhododendrons indicates poor assimilation of iron from the soil and causes premature plant death. While limestone is often the cause, poorly drained soil or a deeply planted root ball can also explain the phenomenon.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.