• AGM plants

    AGM plants have been through a rigourous 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

Pinus coulteri

Big-cone pine

Big-cone pine

© � RHS 1999

  • Other common names Big-cone pine
    Coulter's pine

    Coulter pine

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  • Genus Pinus can be shrubs or large, evergreen trees, some species with attractive bark, developing an irregular outline with age and bearing long needle-like leaves in bundles of 2, 3 or 5; conspicuous cones may fall or remain on the tree for years

  • Family Pinaceae / Pinaceae

  • Species P. coulteri is a large evergreen tree with a broad, open crown. Stout shoots bear thick, blue-grey needles up to 35cm long, in bundles of three. Massive pale brown cones to 30cm long, with a spine on each scale

  • Plant range W California to Mexico

Characteristics

  • Foliage Evergreen

  • Habit Bushy

Colour

Sunlight

  • Full Sun

  • Aspect South-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Clay

  • Chalk

    Chalk

  • Chalk

    Loam

  • MoistureWell-drained

  • SoilSand, Clay, Chalk, Loam

  • 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 in any well drained soil in full sun

Propagation Propagate by seed sown in containers in a cold frame in late winter. Retain in pots for at least two years

Suggested planting locations and garden types Coastal Architectural

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