• 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

× Cuprocyparis leylandii

Leyland cypress

  • Other common names Leyland cypress

  • Family Cupressaceae

  • Genus × Cuprocyparis are large, very fast-growing evergreen trees of narrowly conical or columnar habit, with tiny scale-like leaves in dense sprays, and small spherical cones

  • Details

    x Cuprocyparis leylandii is large, fast-growing, dense conifer of columnar habit which can reach heights in excess of 30m if unchecked. Its dense foliage forms flattened, slightly drooping sprays of scale-like leaves

Characteristics

  • Foliage Evergreen

  • Habit Columnar/Upright

  • Toxicity Foliage may cause skin irritation

  • 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

  • Sand

    Sand

  • Clay

    Clay

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Clay, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height Higher than 12 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow in well-drained soil in full sun or part shade. Suitable for hedging but requires regular trimming to keep under control. Fast growing and it has the potential to become a nuisance

Propagation Propagate by semi-hardwood cuttings

Suggested planting locations and garden types Hedging & Screens Architectural

How to care

Pruning Regular trimming of young, green shoots will keep hedges neat and growth in check; trim two to three times in growing season. If old wood is pruned, regrowth will not occur

Pests May be affected by conifer aphids and scale insects

Diseases May be affected by a canker and honey fungus; see Conifers: brown patches

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