• 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

Ilex crenata

box-leaved holly

box-leaved holly

© Dorling Kindersley Ltd

  • Other common names box-leaved holly
    Japanese holly

  • Family Aquifoliaceae

  • Genus Ilex can be deciduous or evergreen shrubs and trees with often spiny leaves, small white flowers (male and female usually on separate plants) and, on female plants, showy berries in autumn

  • Details I. crenata is a slow-growing, evergreen shrub or small tree, to 6m tall, with glossy, sometimes spiny, wavy-toothed, tiny leaves to 3cm long and nearly 2cm wide. Small white flowers, borne in summer, are followed by black fruits

  • Plant range Far East

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • Toxicity Berries 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

  • Partial Shade

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

  • Exposure Exposed or Sheltered

Soil

  • Loam

    Loam

  • Clay

    Clay

  • Sand

    Sand

  • Chalk

    Chalk

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Clay, Sand, Chalk

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 4-8 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Easy to grow in a well-drained soil in a sunny position or part shade. Excellent as a dwarf hedge

Propagation Propagate by seed or by semi-hardwood cuttings

Suggested planting locations and garden types Garden Edging Hedging & Screens City & Courtyard Gardens Cottage & Informal Garden

How to care

Pruning Pruning group 8

Pests Aphids, scale insects and holly leaf miner may be a problem

Diseases May be affected by holly leaf blight

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