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Rhododendron dauricum Praecox

Rhododendron ciliatum x dauricum Praecox
Rhododendron

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Among the first to bloom, from mid-March, this famous bushy little Rhododendron disappears under a cloud of large flowers in a lavender pink shade turning towards mauve. Grouped in countless small bouquets, they almost obscure an evergreen foliage woven with elegant small dark and shiny leaves. Quite hardy, the bush however requires a sheltered position from cold and dry winds that could damage its flower buds. Superb in pots or in the garden, in partial shade, in acidic soil and in a humid climate. Variety awarded by the RHS.
Flower size
4 cm
Height at maturity
1.20 m
Spread at maturity
1.20 m
Exposure
Partial shade, Shade
Hardiness
Hardy down to -23°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 November
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Flowering time March to April
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Description

Rhododendron 'Praecox' is a dwarf cultivar that owes its success to its particularly early and abundant lavender flowering. Among the first to bloom, it enlivens the garden from the end of winter, accompanying narcissus and oriental hyacinths. Compact and bushy, this adorable evergreen bush carries small clusters of large flowers in a pinkish mauve shade, almost overshadowing its elegant little foliage of beautiful bright green. With its compact growth, generosity, and early flowering, 'Praecox' stands out as one of the most beautiful ericaceous bushes for the terrace or small spaces. Rhododendrons require a light, fresh, limestone-free soil and a humid climate to reach their full potential.

 

Derived from the cross between Rhododendron ciliatum and R. dauricum, Rhododendron 'Praecox' was awarded an Award of Garden Merit in England by the Royal Horticultural Society (RHS). It belongs to the heath family, almost exclusively confined to acidic soils. It is a small-sized, bushy and highly branched variety, slightly spreading, rarely exceeding 1.20m (3ft 11in) in all directions at maturity. Its growth is slow, so that at the age of 10, it will measure on average 80cm (31.5in) in all directions. The branches bear small persistent, ovate, leathery, aromatic leaves that are dark green and shiny on the upper side, lighter on the reverse. With its dense and harmonious vegetation and elegant foliage, this bush has a real presence in the garden all year round. It stands out from mid-March, sometimes from the end of February in mild climates, with a remarkably generous flowering in bright colours. The funnel-shaped flowers, 4 to 5cm (1.6 to 2in) wide, are grouped in clusters of 3 to 5 at the tips of numerous stems, submerging the vegetation. Starting as pink-violet buds, they open into a lovely pink-mauve tone while they release long pink stamens with white anthers.

 

This compact bush is ideal as a border plant or in a container, provided it has suitable soil and climate; "rhodos" are as attractive as they are exclusive! Its pink-mauve colour blends well with the pastel tones of hydrangeas (a wide choice, from white to pink, passing through blue), the colourful young shoots of Pieris, as well as a whole range of shades of red-purple and garnet, such as the foliage of Japanese maple 'Atropurpureum' or the flowers of Loropetalum chinense 'Fire Dance'. For a contemporary-inspired scene or a minimalist garden, associate it rather with white flowers and foliage, such as a white Bleeding Heart and the foliage of the copper fern (Dryopteris erythrosora). Mixed with varieties in matching tones, dwarf Rhododendrons also make charming small hedges or large borders at the front of larger shrub beds.

Rhododendron dauricum Praecox in pictures

Rhododendron dauricum Praecox (Flowering) Flowering
Rhododendron dauricum Praecox (Foliage) Foliage

Plant habit

Height at maturity 1.20 m
Spread at maturity 1.20 m
Habit Irregular, bushy
Growth rate slow

Flowering

Flower colour mauve
Flowering time March to April
Inflorescence Corymb
Flower size 4 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour dark green
Aromatic? Fragrant foliage when creased
Foliage description Aromatic leaves when crushed

Botanical data

Genus

Rhododendron

Species

ciliatum x dauricum

Cultivar

Praecox

Family

Ericaceae

Other common names

Rhododendron

Origin

Cultivar or hybrid

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Planting and care

Plant Rhododendron 'Praecox' in partial shade, away from burning rays, protected from cold and drying winds, in a cool, humus-rich and light soil with an acidic tendency. Like all heathland plants, it does not tolerate limestone soils or heavy soils saturated with water in winter. The cultivation of rhododendrons is disappointing in the long term on limestone subsoil, even when providing them with a heathland soil pit, a cultivation often accompanied by watering with also limestone water, which should be avoided.

Dig a hole three times larger than the pot. Soak the root ball in non-limestone water and plant the bush at collar level, in a mixture composed of 1/4 peat, leaf compost, gravel or pumice and loam. Water abundantly and keep the soil moist in summer with mulching. Azaleas and Rhododendrons have a shallow root system. Therefore, they fear long periods of drought, as well as waterlogged and suffocating soils. That's why a humus-enriched soil and abundant watering during dry periods are recommended. Moreover, this root system is not very strong, which is why it is essential to lighten heavy soils with draining materials (gravel, pumice, clay pellets) at planting. Apply a mulch of shredded pine bark around 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 by the famous "rhododendron beetle" which does not often cause significant damage. Yellowing of the leaves (chlorosis) in Rhododendron indicates poor assimilation of iron in the soil and causes premature plant death. While limestone rising from deep layers of the soil is often the cause, poorly drained soil or a root ball planted too deeply can also explain this phenomenon.

Planting period

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

Intended location

Suitable for Shaded rockery, Woodland edge
Type of use Edge of border, 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 Very good
Overwinter Can be left in the ground

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