• 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

Cotoneaster dielsianus

Diels' cotoneaster

  • Other common names Diels' cotoneaster

  • Family Rosaceae

  • 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

  • Details C. dielsianus is an elegant, medium-sized deciduous shrub to 3m, with slender arching to pendulous branches. The leaves have slightly impressed veins above, grey or greenish felting beneath, colouring brightly in autumn. The clusters of summer flowers are pinkish, followed by scarlet berries

  • Plant range China (Sichuan, Hubei)

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • Toxicity Fruit may cause mild stomach upset if ingested

  • 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

Sunlight

  • Full Sun

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Chalk

  • Clay

    Clay

  • Sand

    Sand

  • Loam

    Loam

  • MoistureWell-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 2.5-4 metres

  • Ultimate spread 2.5-4 metres

  • Time to ultimate height 10-20 years

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 Low Maintenance Wall-side Borders Hedging & Screens Drought Resistant Banks and Slopes Wildlife Gardens

How to care

Pruning Pruning group 1

Pests May be prone to woolly aphids, scale insects and cotoneaster webber moth

Diseases May suffer from fireblight, honey fungus, silver leaf, leaf spot (fungal) and a virus

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