• 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

Larix gmelinii

Dahurian larch

© RHS
  • Other common names Dahurian larch

  • Synonyms Larix dahurica

  • Family Pinaceae

  • Genus Larix are deciduous trees of conical habit, with good autumn colour from the soft, needle-like leaves which are borne in whorls on spur-like lateral shoots and spirally arranged on young growth; small ovoid cones persist on the branches

  • Details L. gmelinii is a deciduous, coniferous tree that can reach 35m, with a broadly conical shape and horizontal branches. Bright green, needle-like leaves are carried in bunches, and turn yellow in autumn. Male flowers are yellow, females start purple then ripen into erect, brown cones about 3cm long

  • Plant range NE Asia

Characteristics

  • Foliage Deciduous

  • 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)

    H7

Colour

Sunlight

  • Full Sun

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

  • Exposure Exposed

Soil

  • Sand

    Sand

  • Clay

    Clay

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Clay, Loam

  • pHAcid, Neutral

Size

  • Ultimate height Higher than 12 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height more than 50 years

How to grow

Cultivation An exceptionally hardy tree that does best in areas with very cold winters and cool summers. In milder areas it is easily damaged by late spring frosts

Propagation Propagate by seed in containers in early spring, grafting in winter, or root semi-ripe cuttings in summer under mist; cuttings are difficult to root

Suggested planting locations and garden types Low Maintenance Architectural

How to care

Pruning No pruning necessary

Pests May be attacked by adelgids

Diseases Honey fungus may be a problem and canker may cause dieback

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