• 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

Tecophilaea cyanocrocus

Chilean blue 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
Chilean blue crocus

© RHS 2002

  • Other common names Chilean blue crocus
    Chilean crocus

  • Family Tecophilaeaceae

  • Genus Tecophilaea are cormous herbaceous perennials with linear-lance-shaped basal leaves and 1-2 funnel-shaped, vivid blue or violet, often white-throated flowers in spring

  • Details T. cyanocrocus is a cormous perennial to 10cm in height, with narrow greyish-green leaves and slender stems bearing solitary, erect, intense blue, white-centred, crocus-like flowers 3-4cm in width

  • Plant range Chile

Characteristics

  • Foliage Deciduous

  • Habit Tufted

  • 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)

    H3

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or East-facing

  • Exposure Sheltered

Soil

  • Chalk

    Loam

  • Chalk

    Sand

  • MoistureWell-drained

  • SoilLoam, Sand

  • pHAcid, Neutral

Size

  • Ultimate height Up to 10 cm

  • Ultimate spread 0-0.1 metre

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in well-drained, sandy soil in full sun; protect from frost. Or grow in a pot in an alpine house: plant 5cm deep in a mix of equal parts loam-based potting compost and sharp sand; water in growing season but reduce watering as the leaves die down in summer

Propagation Propagate by removing offsets in late summer

Suggested planting locations and garden types Gravel Garden Patio & Container Plants Rock Garden

How to care

Pruning No pruning required

Pests Generally pest free

Diseases Generally disease free

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