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Colchicum tenorei

Tenore autumn crocus

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
Tenore autumn crocus

© RHS 2002

3 suppliers

  • Other common names Tenore autumn crocus

  • Synonyms Colchicum speciosum 'Tenori'

  • Family Colchicaceae

  • Genus Colchicum are cormous perennials with usually coarse, broadly strap-shaped leaves which appear with or after the goblet-shaped flowers

  • Details C. tenorei is a free-flowering, cormous perennial to 15cm in height, with faintly tessellated, rosy-pink flowers 6cm in length, the stigma-lobes purple

  • Plant range Italy

Characteristics

  • Foliage Deciduous

  • Habit Clump-forming

  • Toxicity All parts are highly toxic by ingestion

  • 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)

    H4

Colour

Sunlight

  • Full Sun

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

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Clay

    Clay

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Clay, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in moist but well-drained, deep, humus-rich, fertile soil. Intolerant of waterlogging

Propagation Propagate by seed sown in containers in an open frame when ripe or separate corms when dormant in summer

Suggested planting locations and garden types Flower borders and beds Low Maintenance Underplanting of Roses and Shrubs Cottage & Informal Garden Patio & Container Plants

How to care

Pruning No pruning required

Pests Slugs may be a problem

Diseases May be subject to bulb grey mould

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