Skip to site navigation

Vaccinium corymbosum 'Duke' (F) AGM

Home  |  Plants > Plant Selector > Vaccinium corymbosum 'Duke' (F) AGM

© RHS

Characteristics

Plant type

Shrub

Habit

Bushy

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Flower

White in Spring and Summer

Foliage

Green in Spring and Summer
Red and Yellow in Autumn

Fruit

Black and Blue in Summer

Size

Ultimate height

1.5-2.5 metres

Ultimate spread

1-1.5 metres

Time to ultimate height

5-10 years


Preferred common name

blueberry 'Duke'

Family

Ericaceae


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

'Duke' is a bushy upright deciduous shrub to 2m tall, with small oval leaves turning red and yellow in autumn, and cylindrical creamy-white flowers followed by blue-bloomed, edible fruits ripening in mid to late summer

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing, West-facing or East-facing
  • Sheltered

Cultivation

Plant a sheltered site in well-drained, moisture-retentive, acidic soil, (pH 4.5-5.5) in sun or part shade. Alternatively grow in containers or raised beds filled with ericaceous compost such as John Innes Ericaceous. Pot grown plants benefit from winter protection. For optimal pollination and yield plant three different cultivars. For further cultivation details see blueberry cultivation

Soil

  • Moist but well-drained
  • Acid
  • Sand or Loam

Propagation

Take 10-15cm (4-6in) softwood cuttings in late spring or semi-ripe cuttings in early summer

Suggested planting locations and garden types

City/Courtyard Gardens, Coastal, Cottage/Informal Garden or Flower borders and beds


How to care

Pruning

More mature plants benefit from regular pruning – see pruning blueberries

Pests

Watch out for vine weevil, especially if container grown

Diseases

Can be affected by powdery mildews. Chlorosis due to manganese and iron deficiencies may be a problem – see nutrient deficiencies