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Rhododendron Easydendron Rabatz Inkarho

Rhododendron x griegsonianum Easydendron® INKARHO Rabatz
Azalea, Rhododendron

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This hybrid rhododendron forms a spreading, medium-sized bush covered in late spring with a fantastic, vibrant flowering in pure red, in lovely contrast with the foliage. It is very hardy and tolerates a wide range of soils thanks to the grafting technique Inkharo, which allows it to overcome acidic soils to be planted also in slightly chalky or clayey soil.
Flower size
10 cm
Height at maturity
1.40 m
Spread at maturity
1.80 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
Recommended planting time February to May, September to October
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Flowering time May to June
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Description

The Rhododendron Easydendron Rabatz Inkarho is a hybrid variety that unfurls its dark buds into delicate flowers with frilly and wavy edges, widely displayed, in intense and pure red colour, speckled with black-red on the upper part of the petals. It belongs to the Inkharo range which includes hybrids more tolerant to limestone and clay in the soil. Highly hardy and semi-early, it forms a rather spreading bush, wider than tall, with dark green evergreen leaves. This selection was shortlisted for the plant of the year in 2011 at the Chelsea Flower Show. In a large bed, in a hedge or at the edge of trees, Rabatz can do without acid soil and be planted in more varied soils, even slightly limestone-rich or heavy.

Rhododendrons are plants from the ericaceae family, just like heathers. The history of Inkharo Rhododendrons, somewhat revolutionary plants, started 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 shrubs obtained by 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 limestone-rich. In summary, a soil suitable for hydrangeas. The Rabatz cultivar forms a large branched bush with a dense habit, reaching around 1.40 m in height at 10 years old and 1.80 m in spread, in good growing conditions, in open ground. Its growth is rather slow. Its large leaves are elliptical, dark green and glossy on the upper side, showing a lighter and fuzzy underside. They persist through winter. Around mid-May, for approximately 3 weeks, large funnel-shaped, 10 to 11 cm diameter flowers unfurl at the end of branches in large clusters or spherical corymbs, composed of frilly-edged petals. The flower's centre is speckled with dark red, almost black, and adorned with long light stamens. The petals are pure red.

Rhododendron Rabatz is a very hardy plant, down to -22°C. It is relatively tolerant in terms of exposure, we recommend planting it in non-scorching sun or partial shade, ideally to the east where it benefits from morning sun while being protected from excessive heat. In the garden, with its abundant and delicate flowering, it easily decorates a shaded area, alongside Ferns, blue or variegated hostas, Pieris, shrubby Heathers, Kalmias, Azaleas, Japanese maples, or other rhododendrons from the same group to create superb patchworks of textures and colours. It is versatile and you can also plant it alongside many other flowering shrubs, not necessarily acid-loving: hydrangeas, mock oranges, Japanese quinces, butterfly bushes, abelias, or autumn camellias. Japanese Anemones will also be good companions, as well as bugbanes and foxgloves, in the understory.

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Plant habit

Height at maturity 1.40 m
Spread at maturity 1.80 m
Habit Irregular, bushy
Growth rate slow

Flowering

Flower colour red
Flowering time May to June
Inflorescence Corymb
Flower size 10 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Botanical data

Genus

Rhododendron

Species

x griegsonianum

Cultivar

Easydendron® INKARHO Rabatz

Family

Ericaceae

Other common names

Azalea, Rhododendron

Origin

Cultivar or hybrid

Product reference19154

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Planting and care

Plant Rhododendron Easydendron Rabatz Inkarho in a semi-shaded position, protected from cold and drying winds, in moist, loose, fertile soil. It will prefer a slightly calcareous, neutral, or acidic 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 the collar level, in a nourishing mix composed of leaf compost, gravel or pumice, and loam or topsoil, as the Inkarho Rhododendrons are nutrient-demanding plants. Water generously and keep the soil consistently moist. Azaleas and Rhododendrons have a rather shallow root system. This makes them sensitive to long periods of drought so enriching the soil with humus and providing abundant watering during dry spells are recommended. Apply a bark or mulch at the base of the bush every spring to maintain soil moisture while keeping a slightly acidic pH. Maintenance involves deadheading the faded flowers and removing dead branches.

Azaleas and Rhododendrons can sometimes be attacked by vine weevils that eat the edges of the leaves and rootlets, as well as by the famous "rhododendron borer," which does not often cause severe damage. There are effective natural solutions against vine weevils. Yellowing of the leaves (chlorosis) in Rhododendrons indicates poor iron assimilation in the soil, leading to premature plant death. While limestone is often 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, Free-standing, Hedge
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Partial shade, Shade
Soil pH Neutral, Any
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, 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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