Sorbus aucuparia Black Ruby - Rowan
Sorbus aucuparia Black Ruby - Rowan
Sorbus x aucuparia Black Ruby 'Czarne Rubiny'
Rowan, Mountain Ash, European Rowan
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Description
Sorbus Black Ruby 'Czarne Rubiny', derived from the rowan tree (Sorbus aucuparia), is a large deciduous bush appreciated for its autumn colours and edible blue fruits, which have a sweet flavour and no bitterness. It is not demanding regarding soil, very hardy, and makes an excellent free-standing hedge plant that can also be welcomed in a small garden.
Sorbus 'Black Ruby' 'Czarne Rubiny' belongs to the rose family, like all rowans. Originating from Poland, this cultivar is primarily cultivated for its ornamental qualities and edible fruits. It is a small tree with a bushy habit, of vigorous growth, that can reach a height of 2.5 m with a spread of 2 m. Its young branches are upright, dark brown, slightly hairy, while the older branches turn yellowish-grey or grey. Its deciduous compound leaves, consisting of 9 to 11 ovate or lanceolate leaflets, are dark green and glossy on top, lighter and smooth underneath. They turn red in autumn before falling. The winter buds, almost black and sticky, are quite decorative. In June, the bush is covered with reddish or white flowers, grouped in inflorescences 4 to 5 cm wide, each flower measuring 12 to 15 mm in diameter. The ellipsoid to spherical fruits measure 1 to 1.2 cm in diameter and have a slight layer of bloom. They are grouped in generous clusters.
The Black Ruby rowan 'Czarne Rubiny' is perfect in an informal edible hedge or in a shrub border. Its frost resistance and tolerance to various types of soil make it an easy bush to grow. It pairs particularly well with low-maintenance bushes such as Viburnum lantana (Wayfaring tree), Ribes sanguineum 'Red Bross' (Flowering currant), Sambucus nigra (Black elder), and Chaenomeles japonica 'Cido' (Japanese quince).
Plant habit
Flowering
Foliage
Botanical data
Sorbus
x aucuparia
Black Ruby 'Czarne Rubiny'
Rosaceae
Rowan, Mountain Ash, European Rowan
Sorbus Black Ruby
Eastern Europe
Planting and care
Sorbus 'Black Ruby Czarne Rubiny' is best planted in autumn in rather loamy, moist to slightly dry, acidic, neutral, or calcareous soil. However, it is a tolerant bush that adapts well to ordinary garden soil that is well-tilled. It will thrive in both full sun and partial shade. This small tree has no particular requirements. Remove dead wood or diseased branches. At the end of winter and before new growth begins, prune the crossing inner branches and keep only the vigorous branches to maintain the good habit of the tree.
Mites, aphids, and scale insects are the main enemies of the rowan. Powdery mildew and sooty mould, of fungal origin, can also affect this tree. A preventative treatment with Bordeaux mixture will be sufficient.
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).
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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.