Berberis thunbergii Ruby Star
Berberis thunbergii Ruby Star
Berberis thunbergii Ruby Star®
Japanese Barberry, Thunberg's Barberry
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This plant carries a 24 months recovery warranty
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Description
The Berberis thunbergii 'Ruby Star' is a dwarf barberry variety with a very compact habit. It develops a small clump of beautiful coppery red foliage, intensifying its colour to a very bright red in autumn. Its discreet yellow spring flowering is followed by the formation of berries that turn bright red in autumn. This deciduous shrub, very hardy and accommodating due to its small size, is ideal for borders, at the front of a bed, or as a low hedge.
Berberis thunbergii, also known as Japanese Barberry or Thunberg's Barberry, is a shrub from the Berberidaceae family native to Japan. It is characterised by a bushy, spreading, low habit and deciduous foliage in winter or almost evergreen in mild climates. It is a hardy and undemanding plant, water-efficient, and tolerant of limestone soils.
The 'Ruby Star' cultivar is a dwarf form, not exceeding 40 cm in height and spread at maturity. The young branches are red and have mildly aggressive thorns. The foliage is the main asset of this barberry. It consists of glossy leaves measuring 3 cm long, ovate to rounded. The colour is coppery red with a delicate yellow margin. In April-May, clusters of 1 to 6 small flowers bloom on 1-year-old stems. The bell-shaped flowers, 1 cm long, are a soft yellow slightly streaked with red. They are highly nectariferous and are followed in September-October by small spherical fruits, 6 to 8 mm long, that persist on the branches throughout the winter. The foliage takes on a beautiful blood-red colour before falling.
Plant habit
Flowering
Foliage
Botanical data
Berberis
thunbergii
Ruby Star®
Berberidaceae
Japanese Barberry, Thunberg's Barberry
Cultivar or hybrid
Planting and care
The Berberis thunbergii 'Ruby Star', hardy up to -15°C, should be planted in spring or autumn in any fresh, well-drained soil, even limestone, poor or stony in a sunny position. Reserve partial shade for warmer climates. Water generously and frequently during the first summers. There is no need to fertilise. It requires little maintenance; keep the soil moist, especially in summer. For Berberis planted in hedges, balance the shape in spring and September. Trim the branches after flowering in free hedges to give the bush a rounded, balanced shape. Be careful not to touch the branches with bare hands as they have thorns that are difficult to remove once they penetrate the skin.
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.