Cotoneaster harrovianus

RHS Plant Profile
Harrow cotoneaster

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Harrow cotoneaster RHS
Harrow cotoneaster RHS
Shrubs
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Evergreen shrub with arching stems to 3m high and wide. Striking for its abundant, dense clusters of white flowers with contrasting reddish-purple anthers, arranged in heads along the branches as well as at the ends. Fruits are red, colouring slowly during autumn, and best in December

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand, Clay

Max Height

2.5-4 metres

Max Spread

2.5-4 metres

Size

Time to Maturity
5–10 years
Max Spread
2.5-4 metres
Max Height
2.5-4 metres

Growing Conditions

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

Position

Full sun Partial shade
Aspect
East–facing or South–facing or North–facing or West–facing
Exposure
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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Rosaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy, Spreading branched
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
W China, Vietnam

How to Grow

Cultivation

Grow in moderately fertile, well-drained soil in sun or partial shade; tolerant of dry conditions

Propagation

Propagate by seed in containers in a cold frame as soon as ripe in autumn or propagate by semi-ripe cuttings in late summer

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Wildlife gardens
  • Low Maintenance
  • Hedging and screens

Pruning

Pruning group 8 or Pruning group 13 for wall-trained plants

Pests

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

Diseases

May be susceptible to fire blight and honey fungus