• 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

Corylus maxima 'Purpurea' (F)

purple-leaved filbert

purple-leaved filbert

© RHS 2002

  • Other common names purple-leaved filbert

  • Synonyms Corylus maxima 'Purple Filbert'

  • Family Betulaceae

  • Genus Corylus are deciduous trees and large shrubs with broad leaves, and showy male catkins in early spring, followed by edible nuts

  • Details 'Purpurea' is a large deciduous shrub to 6m, with broad, deep purple leaves to 12cm in length. Pendulous pale yellow catkins on leafless twigs in late winter are followed by edible nuts concealed by a tubular husk


  • Foliage Deciduous

  • Habit Bushy

  • 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)




  • Full Sun

  • Partial Shade

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

  • Exposure Exposed or Sheltered


  • Chalk


  • Chalk


  • Chalk


  • Chalk


  • MoistureWell-drained, Moist but well-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAlkaline, Neutral


  • Ultimate height 4-8 metres

  • Ultimate spread 2.5-4 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grows well in chalky soil in sun or partial shade. For fruit production, grow as a goblet-shaped bush. Keep clear soil in a 60cm radius around trunk

Propagation Propagate by grafting

Suggested planting locations and garden types Hedging & Screens Low Maintenance Cottage & Informal Garden Wildflower meadow Wildlife Gardens

How to care

Pruning Pruning group 1

Pests Prone to caterpillars, sawflies and aphids

Diseases Generally disease free

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