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Rhododendron Blue Jay

Rhododendron Blue Jay
Rhododendron hybride

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This compact and bushy rhododendron, measuring 1.30m (4ft) in height and 1m (3ft) in width, has beautiful evergreen foliage in a dark glossy green. In May-June, it is covered in clusters of light mauve to lavender blue flowers, speckled with purple. Decorative throughout the year, this hardy bush can be grown both in the ground and in pots, in acidic soil, in semi-shade or even in the morning sun if the soil remains moist.
Height at maturity
1.30 m
Spread at maturity
1 m
Exposure
Partial shade, Shade
Hardiness
Hardy down to -20°C
Soil moisture
Moist soil
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Best planting time March to April
Recommended planting time February to May, September to October
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Flowering time May to June
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Description

Rhododendron 'Blue Jay' is a beautiful rhododendron that will quickly become the star of a heathland bed or a balcony! Of medium stature, with compact vegetation and adorned with dense and glossy foliage, this variety offers an extraordinary flowering in May-June: its dark mauve buds are accompanied by fully open flowers in lavender blue to light mauve, with purple macules, forming a tenderly coloured display.  A harmonious habit, beautiful evergreen foliage, and a wonderful flowering are the assets of 'Blue Jay', which will fully demonstrate its potential in a light, damp soil devoid of limestone, un a wet climate. This Rhododendron tolerates sunny exposures better than many others if the soil remains moist.

 

Resulting from the cross-breeding of several species, Rhododendron 'Blue Jay' is a plant from the family of Ericaceae, almost exclusively adapted to acidic soils. It is a relatively hardy hybrid variety with large flowers. It forms a bushy and branching shrub, rather rounded, about 1.30 m (4ft) in height and 1 m (3ft) in spread, and bears persistent ovate to elliptical leaves, shiny green on top, velvety and lighter on the underside. Its growth is quite slow, its vegetation harmonious, and its foliage elegant, so that it has a real presence in the garden all year round. However, it is in May-June that it stands out thanks to its remarkably generous flowering with bright and soft nuances. The bell-shaped flowers, grouped at the end of numerous stems, are dark mauve in buds and open into a light mauve to lavender blue, adorned with a pronounced purple-red macule.

 

The Rhododendron 'Blue Jay' is a flowering plant and quite hardy, down to -15°C (5°F) . Although they prefer a semi-shady exposure, hybrid Rhododendrons can withstand the morning sun as long as it is not scorching and their base remains damp. 'Blue Jay', with its abundant and bright flowering, will easily dress up a shaded corner of the garden, in the company of Ferns, blue or variegated Hostas, Pieris, Heathers, Kalmias, Azaleas, and Japanese Maples, or other rhododendrons of the same group to create superb patchworks of textures and colours in spring. Rhododendrons can also be used to create beautiful hedges, alone or with camellias or mimosas (in mild climates), for example. Cultivation in pots requires regular watering with non-calcareous water and specific fertilizer for heathland plants.

Rhododendron Blue Jay in pictures

Rhododendron Blue Jay (Flowering) Flowering

Plant habit

Height at maturity 1.30 m
Spread at maturity 1 m
Habit Irregular, bushy
Growth rate slow

Flowering

Flower colour mauve
Flowering time May to June
Inflorescence Corymb
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Botanical data

Genus

Rhododendron

Cultivar

Blue Jay

Family

Ericaceae

Other common names

Rhododendron hybride

Origin

Cultivar or hybrid

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Planting and care

Plant the 'Blue Jay' Rhododendron in a partially shaded or even shady location, 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 heathland, it does not tolerate limestone soils or heavy soils saturated with water in winter. If the soil remains moist in summer, this rhododendron will also tolerate morning sun exposure. Avoid planting at its base, as its shallow roots do not tolerate competition from other plants, especially for water resources.

Dig a hole three times larger than the pot. Soak the root ball in non-calcareous water and plant the shrub at the level of the collar, in a mixture composed of 1/4 compost, humus, gravel or pumice, and loam. Water generously and keep the soil moist in summer.

Azaleas and Rhododendrons have a shallow and relatively limited root system. Therefore, they are sensitive to long periods of drought. That is why it is recommended to enrich the soil with humus beforehand and water abundantly with non-calcareous water during dry periods. In addition, this root system is not very strong, which is why it is essential to lighten heavy soils with draining materials (gravel, pumice, clay pellets) when planting. Apply a mulch of shredded pine bark around the base of the bush every spring to maintain soil moisture while keeping an acidic pH.

Maintenance involves removing old faded flowers in summer using pruning shears and clearing the plant of 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 significant damage. Yellowing of the leaves (chlorosis) in Rhododendrons indicates poor iron assimilation in the soil and can lead to the premature death of the plant. While limestone is generally the cause, poorly-drained soil or deeply planted root balls can also explain the phenomenon.

 

Planting period

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

Intended location

Suitable for Woodland edge, Undergrowth
Type of use Border, Container
Hardiness Hardy down to -20°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Partial shade, Shade
Soil pH Acidic
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, Humus-rich or peaty, or even sandy, fertile and well-drained

Care

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

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