Rhododendron yakushimanum Bohlken's Roter Stern Inkarho
Rhododendron yakushimanum Bohlken's Roter Stern Inkarho
Rhododendron yakushimanum Easydendron® inkharo® Bohlken's Roter Stern®
Yaku rhododendron, Yakushima rhododendron
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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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.
Rhododendron yakushimanum Bohlken's Roter Stern Inkarho in pictures
Plant habit
Flowering
Foliage
Botanical data
Rhododendron
yakushimanum
Easydendron® inkharo® Bohlken's Roter Stern®
Ericaceae
Yaku rhododendron, Yakushima rhododendron
Cultivar or hybrid
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.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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