• 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

Zantedeschia aethiopica 'Crowborough'

Arum lily 'Crowborough'

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
Arum lily 'Crowborough'

© � RHS 2001

  • Other common names Arum lily 'Crowborough'

  • Synonyms Zantedeschia 'Crowborough'

  • Genus Zantedeschia can be deciduous or semi-evergreen, tuberous perennials with lance-shaped or arrow-shaped leaves and tiny yellow flowers forming a dense spike-like spadix, with a showy, hood-like spathe, sometimes followed by orange berry-like fruits

  • Family Araceae / Araceae

  • Species 'Crowborough' is a deciduous perennial (evergreen in mild areas) to 1m in height, with rich green, arrow-shaped leaves and funnel-shaped white spathes to 15cm in length, with a prominent yellow spadix

Characteristics

  • Foliage Deciduous

  • Habit Clump-forming

  • Toxicity All parts may cause severe discomfort if ingested. The sap may irritate skin and eyes

  • 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)
    Old hardiness ratings

    While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.

    • H1 - Requires heated glass
    • H2 - Requires unheated glass
    • H3 - Hardy outside in some regions of the UK
    • H4 - Hardy throughout the UK
    • H1 + H3 - Requires heated glass but may be grown outside in summer

    For full details of the hardiness ratings see

    see more

    H4

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Clay

  • Chalk

    Loam

  • MoisturePoorly-drained

  • SoilClay, Loam

  • pHNeutral, Acid, Alkaline

Size

  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    5-10 years

How to grow

Cultivation Grow in planting baskets in heavy loam soil in water up to 30cm deep, in full sun. Protect overwintering plants by placing baskets in a frost-free environment

Propagation Propagate by division in spring

Suggested planting locations and garden types Flower borders and beds Wall-side Borders Cottage & Informal Garden

How to care

Pruning No pruning required

Pests Aphids may be a problem

Diseases Generally disease free

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