Rhododendron Château de Josselin
Rhododendron Château de Josselin
Rhododendron 'Château de Josselin'
Rhododendron
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Description
Rhododendron ‘Château de Josselin’ is a large-flowered hybrid with evergreen foliage, flowering in late spring. It is a very hardy, well-branched shrub of medium stature, suitable for large acid soil beds, woodland edges and low hedges. It can also be grown in a large container to adorn a semi-shaded terrace. It is named for the famous Breton castle, whose park is home to a rich collection of azaleas, rhododendrons, camellias and hydrangeas.
Belonging to the Ericaceae family, Rhododendron ‘Château de Josselin’ is also sold under the name Rhododendron ‘Château-Josselin’. Its name refers to the Château de Josselin, located in Morbihan, whose gardens are home to numerous species and varieties of rhododendrons; this cultivar was obtained in the early 2000s.
Its habit is bushy, dense, and slightly upright. In open ground, it reaches between 1.50 and 2 m in height and 1.50 m in width; one can expect about 1.20–1.50 m in height by 10 years, depending on the soil and climate. In a container, it does not exceed 1 m to 1.20 m. Rhododendrons have a superficial and shallow root system that spreads on the surface. The evergreen foliage is medium green, formed of leathery, elliptical leaves.
Flowering occurs from May to June; the terminal inflorescences, at the end of the branch, bear funnel-shaped corollas. They are orange-pink to salmon with darker pits. This variety is hardy down to –20 °C.
Plant this beautiful Rhododendron 'Château de Josselin' in acidic soil (pH 4.5 to 6), rich in humus, moist, but well-drained, in partial shade or at the foot of deciduous trees. In a bed, associate it with fine foliage or complementary flowerings: Enkianthus campanulatus ‘Red Bells’ for its late spring and autumn colour, Kalmia latifolia ‘Olympic Fire’ for its decorative buds, Fothergilla × intermedia ‘Mount Airy’ for its spring fragrance and autumn hue, and Hydrangea serrata ‘Bluebird’ for its beautiful blue flowers in summer.
Rhododendron Château de Josselin in pictures
Plant habit
Flowering
Foliage
Planting and care
Plant Rhododendron 'Château Josselin' in partial shade, in a position sheltered from cold, drying winds, in moist, humus-bearing, light soil, tending towards acidity. Like all ericaceous plants, it does not tolerate calcareous soils, nor heavy soils, waterlogged in winter. Dig a hole three times the volume of the pot. Soak the root ball in (non-calcareous) water and plant the shrub at collar level, in a mixture composed of 1/4 peat, leaf mould, gravel or pozzolana and topsoil. Water copiously and keep the soil moist in summer. Azaleas and Rhododendrons have a relatively shallow root system. Consequently, they do not cope well with long periods of drought. This is why a soil enriched with humus and abundant watering during dry periods are recommended. Furthermore, this root system is not very strong, which is why it is essential to lighten heavy soils with draining materials (gravel, pozzolana, clay pebbles) at planting time. Apply a mulch of crushed pine bark at the foot of the bush every spring to keep the soil moist while maintaining an acidic pH. Maintenance consists of cutting off the faded flowers in summer and cleaning it of its dead branches. Azaleas and Rhododendrons can sometimes be attacked by vine weevils, which eat the edges of the leaves and the rootlets, as well as by the famous 'rhododendron leafhopper', which does not often cause severe damage. Yellowing of the leaves (chlorosis) in Rhododendron indicates poor assimilation of iron in the soil and causes premature death of the plant. Lime is usually the cause, but poorly drained soil or a root ball planted too deeply 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).
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 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.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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