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Rhododendron Blewbury

Rhododendron roxieanum Blewbury

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Graden Merit
This exceptional variety, resulting from a rare cross-breeding between two rarely used parents, has been awarded the Royal Horticultural Society's Award of Garden Merit for its ornamental qualities. First of all, its foliage, which is elliptical and bulging, dark green and shiny, is particularly noticeable. Then, its bright pink buds invade the plant before opening into white flowers tinged with light pink, thanks to the presence of a wine-coloured spot that gently colours the flower. Plant this reduced-size rhododendron in all gardens, in dappled shade, in flower beds and borders, on the edges of groves and Japanese gardens.
Flower size
4 cm
Height at maturity
80 cm
Spread at maturity
90 cm
Exposure
Partial shade, Shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to May, September to October
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Flowering time April to May
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Description

Rhododendron Blewbury is an exceptional variety of dwarf rhododendron. Its fantastic white spring flowering covers a lovely elliptical foliage that is slightly convex and pointed with curled edges. The first ornaments in late winter are its bright pink buds. Then, for a long month, from mid-April to mid-May, clusters of 18 to 20 bell-shaped flowers, white with a wine-coloured mark, giving a washed-out pink appearance, almost completely invade the elegant bush. This variety has received an Award of Garden Merit from the Royal Horticultural Society in England. With remarkable elegance and radiance, this little "rhodo" stands out as much as a larger plant in gardens of all sizes.

Rhododendrons are plants of the Ericaceae family, which includes about a hundred genera, many of which are common in our gardens. Heathers, Kalmia, Andromeda, Leucothoe, Oxydendrum, or Gaultheria are valuable in ornamental beds, while Strawberry Trees and especially Blueberries delight us with their fruits. For the most part, these are plants that prefer soils devoid of limestone, with an acidic tendency and humid climates.

Rhododendron Blewbury comes from a rare cross between Rhododendron roxieanum var roxieanum and maculiferum ssp anwheiense. It forms a dense bush with a rounded habit, reaching 80 cm in height and 90 cm in width at maturity. Its evergreen leaves are elliptical in shape, slender, and leathery with curled edges. During April and May, longer flowering than most rhododendrons invades this dwarf shrub, which is literally covered with bright pink floral buds that then open into white flowers about 3.5 cm in size, shaded with light pink, thanks to their wine-coloured markings. The flowers are grouped in terminal clusters composed of 18 to 20 flowers.

Hardy down to -22°C, Rhododendron Blewbury prefers a semi-shade or dappled shade exposure. With slow growth, this acid-loving ericaceous shrub thrives in moist, humus-rich, well-drained soils. It is ideal as a border plant, in a pot, or even as a standalone specimen in a small garden. In a bed, this miniature Rhododendron occupies the foreground, in front of taller acid-loving plants, such as beautiful Kalmias, or Mountain Laurels, with their dark green foliage and pretty small flowers in May-June. It also thrives in the light shade of an Oxydendrum arboreum, whose long clusters of white bells in summer and vibrant autumn foliage provide a spectacle for much of the year. To ensure flowers all year round, complete this picture with an Autumn Camellia like the magnificent Camellia sasanqua Yuletide, whose bright red flowers with yellow stamens enchant your days from November to January.

Plant habit

Height at maturity 80 cm
Spread at maturity 90 cm
Habit Irregular, bushy
Growth rate slow

Flowering

Flower colour white
Flowering time April to May
Flower size 4 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Botanical data

Genus

Rhododendron

Species

roxieanum

Cultivar

Blewbury

Family

Ericaceae

Origin

Cultivar or hybrid

Planting and care

Plant Rhododendron Blewbury in a sunny or partially shaded location, protected from cold and drying winds, in moist, humus-rich, light soil with an acidic tendency. Like all plants of the heath family, it does not tolerate limestone soils or heavy soils that become waterlogged in winter. Dig a hole three times larger than the pot. Soak the root ball in non-limestone water and plant the bush at the collar level, in a mixture composed of 1/4 organic matter, leaf compost, gravel or pumice, and loam. Water thoroughly and keep the soil moist in summer. Azaleas and Rhododendrons have a shallow root system. As a result, they are susceptible to long periods of drought. That's why humus-rich soil and abundant watering during dry periods are recommended. In addition, this root system is not very strong, so it is essential to lighten heavy soils with draining materials (gravel, pumice, clay pellets) at planting. Apply a mulch of shredded pine bark at the base of the bush every spring to maintain soil moisture while preserving an acidic pH. Maintenance consists of removing faded flowers in summer and cleaning dead branches. Azaleas and Rhododendrons can sometimes be attacked by weevils that eat the edges of leaves and rootlets, as well as the infamous "rhododendron beetle" which does not often cause severe damage. Yellowing of the leaves (chlorosis) in Rhododendron indicates poor assimilation of iron in the soil and can lead to 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

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

Intended location

Suitable for Woodland edge
Type of use Border, Free-standing, Container
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 3 per m2
Exposure Partial shade, Shade
Soil pH Acidic
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, rich and well-drained

Care

Pruning No pruning necessary
Soil moisture Moist soil
Disease resistance Average
Overwinter Can be left in the ground

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