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Rhododendron yakushimanum Bohlken's Roter Stern Inkarho

Rhododendron yakushimanum Easydendron® inkharo® Bohlken's Roter Stern®
Yaku rhododendron, Yakushima rhododendron

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Packaging not satisfactory as it was torn at the staples (PdFleurs, please, review the packaging would be perfect). Bush matches the description. Satisfied.

Pierre, 13/12/2024

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This plant carries a 24 months recovery warranty

More information

A hybrid variety with numerous qualities, this small rhododendron forms a sturdy bush, with shiny, dark green, evergreen foliage, offering a magnificent spring flowering of a beautiful lasting pure red. It is very hardy, part of the Easydendron range (Inkarho) and adapts to many soils, including slightly limestone, loamy or clayey soils. It thrives in partial shade in a border or a large container. A highly versatile variety to be planted in any loose soil, without excessive limestone content.
Flower size
10 cm
Height at maturity
1.20 m
Spread at maturity
1.20 m
Exposure
Partial shade
Hardiness
Hardy down to -20°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
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Description

Rhododendron yakushimanum Easydendron Bohlken's Roter Stern Inkarho is a hybrid with a very compact habit, renowned for the quality of the red colour of its flowers. This pure bright red does not fade throughout the very abundant flowering period, and its large flowers are perfectly complemented by small, shiny dark green leaves. This rhododendron is part of the Inkarho range (Easydendron), which includes hybrids that are more tolerant of limestone and clay in the soil. In summary, it forms a bright and floriferous bush, perfect for easily dressing up a small shaded or slightly shaded area of the garden, with simplified growing conditions, including a wider range of soils.

Rhododendrons encompass over 800 species from the ericaceae family, cultivated for the beauty of their massive flowering. The history of Inkharo Rhododendrons, 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 shrubs 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 essence, a soil suitable for hydrangeas. Rhododendron yakushimanum Bohlken's Roter Stern was originally introduced on its own roots in 1987 in Germany. It forms a dense bush, with a rounded habit reaching about 90 cm in height and 1.40 m wide at 10 years old. Its growth is rather slow. Its small, persistent, leathery dark green elliptical leaves cover the plant well. Flowering occurs in May. Clustered in corymbs, the red floral buds open into large funnel-shaped, 10 cm wide flowers in a beautiful pure red.

Like all yakushimanum hybrids, affectionately known as "rhodos yak" by specialists, Rhododendron Easydendron Bohlken's Roter Stern is quite hardy, rated down to -20°C. Although they prefer partial shade, these hybrids can tolerate the sun as long as it is not scorching (morning sun) and their base remains moist. With its abundant and vividly coloured flowering, this "rhodo" easily enhances a small somewhat shaded area of the garden, alongside Ferns, blue or variegated hostas, Pieris, Azaleas, Japanese Maples, or other rhododendrons from the same group to create stunning patchworks of textures and colours in spring. It is versatile, you can also plant it alongside many other flowering shrubs, not necessarily acid-loving: hydrangeas, mock oranges, Japanese flowering quinces, buddleias, abelias, or autumn camellias. Japanese Anemones will also make good companions, as well as bugbanes and foxgloves, in the understory. Container cultivation requires regular watering.

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Plant habit

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

Flowering

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

Foliage

Foliage persistence Evergreen
Foliage colour dark green
Foliage description Elliptical leaves with pointed apex, 5-6 cm long, with a slightly fuzzy lighter underside, of a tough texture, evergreen.

Botanical data

Genus

Rhododendron

Species

yakushimanum

Cultivar

Easydendron® inkharo® Bohlken's Roter Stern®

Family

Ericaceae

Other common names

Yaku rhododendron, Yakushima rhododendron

Origin

Cultivar or hybrid

Product reference19143

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Planting and care

Plant Rhododendron yakushimanum Easydendron Bohlken's Roter Stern in a semi-shaded position, protected from cold and drying winds, in moist, loose, fertile soil. It should be slightly calcareous, neutral or acidic, a soil that will suit a hydrangea. Dig a hole three times larger than the pot volume. Soak the root ball in water and plant the bush at the level of the collar, in a nourishing mixture composed of leaf compost, gravel or pumice, and loam or topsoil, as the Inkarho Rhododendrons are greedy 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 at the base of the bush every spring to maintain soil moisture while keeping a slightly acidic pH. Maintenance involves cutting off faded flowers and 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 weevil" which does not often cause severe damage. There are effective natural solutions against vine weevils. Leaf yellowing (chlorosis) in Rhododendrons indicates poor assimilation of iron in the soil and can lead to premature plant death. While limestone is often the cause, poorly drained soil or a deep-planted root ball can also explain the phenomenon.

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Planting period

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

Intended location

Suitable for Shaded rockery, Woodland edge
Type of use Border, Edge of 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
Soil pH Neutral, Any
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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