• 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

Notholirion thomsonianum


  • Synonyms Lilium longifolium

  • Family Liliaceae

  • Genus Notholirion are perennial bulbs with narrowly lance-shaped basal leaves in a tuft, and erect stems bearing racemes of funnel-shaped flowers in summer

  • Details N. thompsonianum is a bulbous perennial with narrow, bright green, strap-shaped leaves, up to 45cm at the base, shorter on the stems. The scented, pale lilac-pink, lily-like flowers are produced in spikes of 10 to 30 in early summer

  • Plant range W Him., Afghanistan


  • Foliage Deciduous

  • Habit Columnar/Upright

  • Fragrance Flower

  • 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)




  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered


  • Sand


  • Loam


  • Chalk


  • MoistureWell-drained

  • SoilSand, Loam, Chalk

  • pHAcid, Alkaline, Neutral


  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Plant 10-15cm deep in autumn. Outdoors plant in deep, humus-rich, moist but well drained soil in a sunny position. Provide protection during severe or prolonged frosts. Under glass plant in large containers of loamless potting compost with added leaf mould and sharp sand in bright, filtered light.

Propagation Propagate by seed, or by separating bulblets in autumn

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

How to care

Pruning Deadhead after flowering and allow foliage to die down naturally

Pests Susceptible to slugs and snails

Diseases Generally disease free

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