Cotoneaster dielsianus

RHS Plant Profile
Diels' cotoneaster

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Diels' cotoneaster RHS
Diels' cotoneaster RHS

Synonyms

Cotoneaster applanatus

Shrubs

Upright, deciduous or semi-evergreen shrub about 2.5m tall, with slender arching branches. Dark green leaves have slightly impressed veins, grey or greenish felting beneath, colouring bright red in autumn, and clusters of summer flowers are pink-tinged white, followed by glossy scarlet berries

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

2.5-4 metres

Max Spread

2.5-4 metres

Size

Time to Maturity
10–20 years
Max Spread
2.5-4 metres
Max Height
2.5-4 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or North–facing or West–facing or East–facing
Exposure
Exposed or Sheltered
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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Rosaceae
Native to GB/Ireland
No
Foliage
Deciduous, Semi evergreen
Habit
Bushy
Potentially harmful
Fruit are ornamental - not to be eaten. Wear gloves and other protective equipment when handling. Pets: Fruit are ornamental - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus
Cotoneaster can be deciduous or evergreen shrubs or small trees, with simple, entire leaves and clusters of small white or pink flowers in spring and summer, followed by showy red, purple or black berries
Name Status
Correct
Plant Range
China (Sichuan, Hubei)

How to Grow

Cultivation

Grow in moderately fertile, well-drained soil in full sun

Propagation

Propagate by seed in containers in a cold frame as soon as ripe in autumn or propagate by softwood cuttings (greenwood cuttings) in early summer

Suggested planting locations and garden types

  • Wildlife gardens
  • Cottage and informal garden
  • Low Maintenance
  • Hedging and screens

Pruning

Pruning group 1

Pests

May be susceptible to aphids, woolly aphid, scale insects and cotoneaster webber caterpillar

Diseases

May be susceptible to fireblight and honey fungus