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Ribes sanguineum 'Koja'
  • RHS AGM
  • RHS Plants for pollinators

flowering currant 'Koja'

'Koja' is a deciduous shrub reaching about 2m high with blackcurrant-scented, lobed leaves and hanging clusters of deep red-pink flowers in mid- to late spring, sometimes followed by black berries

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Size
Ultimate height
1.5–2.5 metres
Time to ultimate height
5–10 years
Ultimate spread
1–1.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Pink Green
Summer Green Black
Autumn Green
Winter
Position
  • Full sun
Aspect

South–facing or North–facing or West–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Grossulariaceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy
Genus

Ribes can be deciduous or evergreen shrubs, sometimes spiny, with simple, usually palmately lobed leaves and small tubular or bell-shaped, solitary or racemose flowers borne in spring or summer, followed by juicy, sometimes edible berries

Name status

Accepted

How to grow

Cultivation

Easy to grow in moderately fertile well-drained soil in full sun. Useful for informal hedging

Propagation

Propagate by hardwood cuttings in winter

Suggested planting locations and garden types
  • Coastal
  • Cottage and informal garden
  • City and courtyard gardens
  • Flower borders and beds
  • Hedging and screens
Pruning

Pruning group 2 or Pruning group 13 if wall-trained, in late summer; trim hedges after flowering

Pests

Aphids may be a problem

Diseases

May be affected by a leaf spot, powdery mildews, honey fungus and coral spot

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