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Rhododendron Polar Bear

Rhododendron x Polar Bear
Rhododendron

5,0/5
3 reviews
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Received in very good condition. Indeed, the young shoots are of a beautiful bluish colour. I am eagerly awaiting the flowering of the few large buds hidden in its beautiful foliage.

Elisabeth, 08/10/2022

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This plant carries a 24 months recovery warranty

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Value-for-money
A vigorous variety with large growth, ideal in a shrubbery. The flowering in summer with large white inflorescences exhales a fragrance reminiscent of that of the Lily. This bush has a very upright habit and is adorned with emerald green foliage. A scented and visual spectacle in July and August!
Height at maturity
5 m
Spread at maturity
5 m
Exposure
Partial shade, Shade
Hardiness
Hardy down to -15°C
Soil moisture
Moist soil
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Best planting time March to April, September to October
Recommended planting time February to May, September to October
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Flowering time July to August
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Description

Rhododendron 'Polar Bear' is a vigorous variety with a large growth habit, ideal in an ericaceous bed. Its summer flowering offers large white trumpet-shaped inflorescences that emit a fragrance reminiscent of Lilies. This bush has a very upright habit and is adorned with emerald green foliage. An aromatic and visual spectacle in July and August!

 

Rhododendron 'Polar Bear' is a hybrid between R. auriculatumand R. diapretes, a variety obtained by John Barr Stevenson in 1926. The result is an extremely vigorous and splendid plant (characteristics inherited from auriculatum) that flowers late (typical of diapetres). Unlike the majority of rhododendrons, this large variety is a summer star with its late flowering as magnificent as it is fragrant. Its inflorescences appear in July and August, in corymbs of large white tubular flowers. This very tall cultivar can reach a height of 5m (16ft) or more if it is happy with its location. It will also spread in width! The bush with its ample habit has young shoots of a bluish hue and large evergreen leaves of an emerald green colour.

 

Rhododendron 'Polar Bear' is an ericaceous bush. It will find its place in shade or partial shade as its flowers will be damaged by the sun. The soil must be moist, humus-rich, and well-drained, with an acidic pH, it does not tolerate limestone. The last condition is that it must be planted sheltered from prevailing winds. It is a hardy plant that can withstand temperatures down to -12°C (10.4°F), like the majority of rhododendrons. Plant Rhododendron 'Polar Bear' in an ericaceous bed, as a specimen plant, or in a hedge. In the case of a bed, it should be cultivated in the background due to its strong growth. Combine it with Chinese azaleas, andromedas (Pieris), mountain laurels (Kalmia), Japanese maples (Acer japonicum), or other smaller rhododendrons at maturity such as the 'Bloombux', 'Percy Wiseman', or the surprising R. linearifolium cultivars.

Rhododendron Polar Bear in pictures

Rhododendron Polar Bear (Flowering) Flowering
Rhododendron Polar Bear (Plant habit) Plant habit

Plant habit

Height at maturity 5 m
Spread at maturity 5 m
Habit Irregular, bushy
Growth rate normal

Flowering

Flower colour white
Flowering time July to August
Inflorescence Corymb
Fragrance Fragrant, evokes the scent of the Lily
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour green

Botanical data

Genus

Rhododendron

Species

x

Cultivar

Polar Bear

Family

Ericaceae

Other common names

Rhododendron

Origin

Cultivar or hybrid

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Planting and care

Plant the Rhododendron 'Polar Bear' in a shady or semi-shady position, protected from cold and drying winds, in a moist, humus-rich, and light soil with an acidic tendency. Like all plants in the heath family, it does not tolerate limestone soils or heavy soils saturated with water 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 consisting of leaf compost, gravel or pumice, and loam. Water thoroughly and keep the soil moist in summer. Azaleas and Rhododendrons have a shallow root system, so they are susceptible to long periods of drought. Therefore, it is advisable to enrich the soil with humus and provide abundant watering during dry periods. Additionally, 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 crushed pine bark around the base of the bush every spring to maintain soil moisture and acidic pH. Maintenance involves removing faded flowers in summer and removing any dead branches.

Azaleas and Rhododendrons can sometimes be attacked by weevils that eat the edges of leaves and rootlets, as well as by the famous "rhododendron beetle" which does not usually cause significant damage. Yellowing of leaves (chlorosis) in Rhododendrons indicates poor assimilation of iron from the soil and can lead to premature death of the plant. While limestone is often the cause, poorly drained soil or deep planting can also explain this phenomenon.

Planting period

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

Intended location

Suitable for Woodland edge, Undergrowth
Type of use Back of border, Hedge
Hardiness Hardy down to -15°C (USDA zone 7b) 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, rich 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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