• 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

Araucaria heterophylla

Norfolk Island pine

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
  • Other common names Norfolk Island pine
    house pine

  • Synonyms Araucaria excelsa misapplied

  • Family Araucariaceae

  • Genus Araucaria are evergreen trees from the Southern Hemisphere, with whorled branches bearing spirally arranged leaves that may be needle-like, triangular or scale-like, and small male, and large female cones, usually on separate trees

  • Details A. heterophylla is an elegant, conical, coniferous tree with distinctive whirled branches of juvenile, fan-like foliage and mature, spiralled foliage. Young plants are often used as houseplants

  • Plant range Norfolk Island

Characteristics

  • Foliage Evergreen

  • 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)

    H2

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Chalk

    Chalk

  • Sand

    Sand

  • MoistureMoist but well-drained

  • SoilLoam, Chalk, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height Higher than 12 metres

  • Ultimate spread wider than 8 metres

  • Time to ultimate height more than 50 years

How to grow

Cultivation Grow as a containerised tree under glass in areas liable to frost. The plant may be placed outside in a sheltered, sunny position during the summer and brought under glass once more in the autumn. In containers, use a well drained loam-based potting soil (JI No2) with extra perlite. Water freely during the growing season, March to September and keep the compost just moist during the winter. Apply a balanced fertiliser every two weeks during the growing season, but withhold fertiliser during the winter months

Propagation Propagate by seed sown in seedbed as soon as ripe; take cuttings of vertical shoot tips in midsummer and root in a cold frame; cuttings of horizontal side branches will not form an upright tree

Suggested planting locations and garden types Architectural

How to care

Pruning Pruning group 1; little or no pruning is required, as this can permanently spoil the shape of the tree

Pests Generally pest free

Diseases Honey fungus may be a problem

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