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Rhododendron Rosa Dufthecke Inkarho

Rhododendron INKARHO® Rosa Dufthecke
Rhododendron, Azalea

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A soft pink-flowered rhododendron, pleasantly fragrant. It is easy to grow: it tolerates slightly chalky or clayey soils, is hardy down to -24°C, responds well to pruning, grows vigorously and blooms abundantly. It bears beautiful dark green evergreen foliage that remains decorative throughout the year, whether in a border or a hedge. Plant it in any loose and moist soil, without excess limestone, in partial shade.
Flower size
6 cm
Height at maturity
1.50 m
Spread at maturity
2 m
Exposure
Sun, Partial 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 May to June
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Description

Rhododendron Rosa Dufthecke Inkarho is part of a new series of varieties with scented flowers, the "Dufthecke" series, grafted like all Inkharo rhododendrons on a plant much more tolerant of clayey, loamy, or slightly calcareous soils. Rosa Dufthecke is an evergreen bush, wider than tall, with vigorous growth, bearing a profusion of delightful flowers in a soft pink colour lightly speckled with copper-brown. Sweet-smelling, with a subtle but present fragrance, it's a new generation of Rhododendron that challenges our preconceptions; it is as tolerant as a hydrangea, hardy and easy to grow.

Rhododendrons encompass over 800 species of the Ericaceae family, cultivated for the beauty of their massive flowering. The history of Rhododendrons Inkarho, somewhat revolutionary plants recently showcased at the Chelsea Flower Show, began in Germany over 20 years ago. The discovery of a rhododendron naturally growing in a chalk quarry led to the grafting of different varieties onto its extraordinary root system. The bushes obtained through this method tolerate a wide range of soils with a pH ranging from 4.5 to 7.5, provided they are loose, fertile, moist, and not excessively calcareous. In summary, soil suitable for hydrangeas. Rosa Dufthecke forms a medium-sized, spreading bush. Its growth is vigorous, generally reaching 1.50 m in height by 2 m in width at maturity. Its evergreen, beautiful dark green leaves are elliptical and cover the plant well. They have a velvety underside. From mid-May to early June, its abundant flowering overwhelms the bush: clustered in corymbs, its slightly fringed flowers are a delicate pink adorned with a speckled throat in subtle coppery tones.

It's high time for Rhododendrons to break free from acidic soil and this is achieved with the new Inkarho varieties! Moreover, with this Dufthecke series, they are fragrant and vigorous in growth, in addition to having a particularly abundant and sweet-smelling flowering. Rhododendron Rosa Dufthecke is relatively tolerant in terms of exposure; we recommend placing it in non-scorching sun or partial shade, ideally to the east where it will benefit from the morning sun while being protected from excessive heat. In the garden, as a hedge or in a border, its abundant and bright flowering will easily adorn a shaded area. Much more tolerant than usual rhododendrons, it pairs, in a more traditional way, with many other flowering bushes, not necessarily in acidic soil: hydrangeas, mock oranges, Japanese quince trees, butterfly bushes, abelias or autumn camellias. Japanese anemones will also be good companions, as well as silver candles and foxgloves in shady areas.

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Plant habit

Height at maturity 1.50 m
Spread at maturity 2 m
Habit Irregular, bushy
Growth rate normal

Flowering

Flower colour pink
Flowering time May to June
Inflorescence Corymb
Flower size 6 cm
Fragrance Fragrant
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Botanical data

Genus

Rhododendron

Cultivar

INKARHO® Rosa Dufthecke

Family

Ericaceae

Other common names

Rhododendron, Azalea

Origin

Cultivar or hybrid

Product reference19147

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Planting and care

Plant Rhododendron Rosa Dufthecke Inkarho in a semi-shaded position, protected from cold and drying winds, in moist, loose, fertile soil. It will prefer slightly lime-rich (tolerating pH 7.5), neutral or acidic (pH 4.5 to 6.5) soil, suitable for a hydrangea. Dig a hole three times larger than the pot volume. Soak the root ball in water and plant the bush at collar level, in a nourishing mix composed of leaf compost, gravel or pumice, and loam or topsoil, as Rhododendron Inkarho are demanding plants. Water generously and keep the soil consistently moist. Azaleas and Rhododendrons have a relatively shallow root system. As a result, they are sensitive to long periods of drought. Therefore, soil enriched with humus and abundant watering during dry periods are recommended. Apply a mulch of bark at the base of the bush every spring to retain soil moisture while maintaining a slightly acidic pH. Maintenance involves removing faded flowers after flowering and dead branches.

Azaleas and Rhododendrons may sometimes be attacked by vine weevils that eat the edges of leaves and rootlets, as well as by the notorious "rhododendron borer" which does not often cause significant damage. There are effective natural solutions against vine weevils. Yellowing of leaves (chlorosis) in Rhododendron indicates poor iron assimilation in the soil and can lead to premature plant death. While lime is often the cause, poorly drained soil or deeply planted root balls 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 Meadow, Woodland edge, Undergrowth
Type of use Border, Hedge
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral, Any
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, Fertile, loamy

Care

Pruning instructions If required, prune immediately after flowering. Pruning too late can remove the buds and compromise the flowering of the following year. Please note that this rhododendron responds well to pruning.
Pruning No pruning necessary
Soil moisture Moist soil
Disease resistance Good
Overwinter Can be left in the ground

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