Rhododendron Robert Seleger
Rhododendron Robert Seleger
Rhododendron keleticum Robert Seleger
Rhododendron
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This plant carries a 24 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Description
Rhododendron 'Robert Seleger' is a slow-growing horticultural variety with a compact habit, slightly more vigorous than the species. Its evergreen foliage up of small elongated, beautiful glossy dark green leaves, is ornamental all year round. In spring, it provides a perfect backdrop for the magnificent lilac-pink blooms that completely cover the bush. It is extremely hardy and grows in acidic, humus-bearing, moist soil that retains moisture in summer, in sunny to semi-shady exposure. Its dimensions make it a good subject for container cultivation.
Rhododendrons are members of the Ericaceae family, which includes many ornamental genera (Kalmia, Leucothoe, Erica, Calluna, Oxydendrum, Gaultheria, Pieris...) as well as some small fruits (Vaccinium: blueberry, Arbutus: strawberry tree, Arctostaphyllos uva-ursi: bearberry). The Rhododendron genus is very rich in species (about a thousand), including Azaleas (horticultural name, they are actually Rhododendrons).
Native to Tibet, Yunnan in China, and Myanmar (Burma), Rhododendron keleticum is a mountain species that grows at altitudes of 3,000 to 3,900 m. The cultivar 'Robert Seleger' is a horticultural variety obtained by German breeder Dietrich G. Hobbie in 1960, by crossing the species with another Rhododendron that is now forgotten. The result of this cross is a beautiful hybrid with characteristics quite similar to R. keleticum. Its growth is slow, after 10 years of cultivation, it will form a vegetative cushion 30 cm high by 50 cm wide and after 20 years, 40 to 50 cm high by 80 to 100 cm wide. Its beautiful evergreen foliage is proportionate to its dimensions, so the leaves are relatively small. Lanceolate, elongated with a pointed tip, they measure about 5 to 6 cm long by 2 cm wide. Their beautiful dark green surface is somewhat glossy, giving them a pronounced ornamental character.
It blooms in May, in the form of superb trumpet-shaped flowers. Gathered in clusters of a few flowers, they adopt a bright lilac-pink colour punctuated with small purple spots near the corolla's centre. They are very abundant and cover the entire foliage, forming a magnificent spectacle for approximately 3 weeks. This rhododendron is very hardy, down to -23°C.
This 'Robert Seleger' Rhododendron, with its compact habit, can easily be grown in a container on a terrace or balcony due to its slow growth and reduced dimensions. With its ground-covering cushion vegetation, it will be perfect in the foreground of an ericaceous bed. To create attractive layers of vegetation, plant a Canadian Dogwood (Cornus canadensis) alongside it, with low-growing and spreading vegetation, adorned with beautiful foliage that turns fiery purple-red in autumn, large white floral bracts in summer, and decorative red fruits. Behind the Rhododendron, low, upright shrubs such as Mountain Laurels (Kalmia latifolia) will delight you with their attractive blooms. Finally, in the background, you can plant tall shrubs or small trees, such as the fabulous Japanese Maples with their cut foliage in green, variegated, purple, red, or golden, depending on the variety.
Plant habit
Flowering
Foliage
Botanical data
Rhododendron
keleticum
Robert Seleger
Ericaceae
Rhododendron
Cultivar or hybrid
Planting and care
Plant Rhododendron 'Robert Seleger' in a sunny or partially shaded location, protected from cold and drying winds, in moist, humus-rich, light soil with an acidic tendency. Like all plants in the heath family, it does not tolerate alkaline soils or heavy soils that become waterlogged in winter. Dig a hole three times larger than the pot. Soak the root ball in non-alkaline water for fifteen minutes, and plant the bush at the level of the collar, in a mixture composed of 1/4 organic matter, leaf compost, gravel or pumice, and loam. Water thoroughly and keep the soil moist in summer. Azaleas and Rhododendrons have shallow root systems. As a result, they are sensitive to long periods of drought. That is why soil enriched with humus and abundant watering during dry periods are recommended. Additionally, 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 retain soil moisture while maintaining an acidic pH. Maintenance consists of removing faded flowers in summer and cleaning any dead branches.
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).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
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 planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
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.
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