• 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

Hedera helix 'Shamrock'

clover-leaf ivy

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
clover-leaf ivy

© RHS 1999

  • Other common names clover-leaf ivy
    ivy 'Shamrock'

  • Family Araliaceae

  • Genus Hedera are evergreen climbing shrubs clinging by aerial roots. Clusters of small yellow-green flowers are followed by usually black berries. Foliage of flowering shoots is often less deeply lobed than that of the sterile, climbing shoots

  • Details 'Shamrock' is an evergreen climber with small, dark green leaves consisting of a large ovate central lobe and two smaller side lobes; makes a good houseplant

Characteristics

  • Foliage Evergreen

  • Habit Climbing

  • Toxicity Ingestion may cause severe discomfort

  • 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)

    H5

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Full Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Chalk

  • Clay

    Clay

  • Sand

    Sand

  • Loam

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow preferably in an alkaline, moist but well-drained soil in sun or part shade with shelter from cold winds. Although it will tolerate a wide range of soil conditions. Under glass grow loam-based compost such as John Innes No.3 in bright indirect light

Propagation Propagate by softwood cuttings or layering at any time. Root semi-ripe or hardwood cuttings from summer to winter

Suggested planting locations and garden types Flower borders and beds City & Courtyard Gardens Coastal Cottage & Informal Garden Patio & Container Plants

How to care

Pruning Pruning group 11, at any time. Renovate in early spring before the growth starts

Pests May be damaged by scale insects, aphids and glasshouse red spider mite; vine weevil may be a problem when grown in containers.

Diseases May be affected by fungal leaf spot

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