• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Vaccinium vitis-idaea Koralle Group

cowberry Koralle Group

AGM plants

AGM plants have been through a rigorous trial and assessment programme. They are:

  • Excellent for ordinary use in appropriate conditions
  • Available to buy
  • Of good constitution
  • Essentially stable in form & colour
  • Reasonably resistant to pests & diseases
cowberry Koralle Group

© RHS 2002

  • Other common names cowberry Koralle Group

  • Synonyms Vaccinium vitis-idaea 'Korale'

  • Family Ericaceae

  • Genus Vaccinium can be evergreen or deciduous shrubs or small trees, with simple leaves and small, bell- or urn-shaped flowers followed by juicy, sometimes edible berries

  • Details Koralle Group is a bushy dwarf evergreen shrub with neat, lustrous, leathery, obovate dark green leaves and terminal racemes of small, pink, bell-shaped flowers, followed by bright red berries 10mm in width

Characteristics

  • Foliage Evergreen

  • Habit Suckering

  • Hardiness

    Hardiness ratings

    All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

    • H1a - Under glass all year (>15C)
    • H1b - Can be grown outside in the summer (10 - 15)
    • H1c - Can be grown outside in the summer (5 - 10)
    • H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)
    • H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1)
    • H4 - Hardy through most of the UK (-10 to -5)
    • H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
    • H6 - Hardy in all of UK and northern Europe (-20 to -15)
    • H7 - Hardy in the severest European continental climates (< -20)

    H5

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Full Shade

  • Aspect North-facing or East-facing or South-facing or West-facing

  • Exposure Sheltered or Exposed

Soil

  • Chalk

    Loam

  • Chalk

    Sand

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Sand

  • pHAcid

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 5-10 years

How to grow

Cultivation Grows well in extremely acid soils that are moist but well-drained. Tolerant of shade and woodland edges. Susceptible to frost damage and delayed flowering in colder climes

Propagation Propagate by semi-hardwood cuttings in mid to late summer or layer in mid-summer. Propagate by seed sown, in containers, in a cold-frame in autumn

Suggested planting locations and garden types Low Maintenance Ground Cover

How to care

Pruning Pruning group 8

Pests Generally pest free

Diseases Can be affected by root rot

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