• 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

Adiantum venustum

evergreen maidenhair

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
evergreen maidenhair

© RHS 2000

  • Other common names evergreen maidenhair

  • Family Pteridaceae

  • Genus Adiantum can be deciduous or evergreen ferns with shiny black stalks bearing simple or more usually pinnately divided fronds, the segments fan-shaped, oblong or rounded, carrying spores under reflexed marginal flaps

  • Details A. venustum is a deciduous fern, almost evergreen in mild areas, with a thin, creeping rhizome, forming a mat to 25cm in height, with ovate fronds composed of many small fan-shaped segments, often turning an attractive rusty-brown in autumn and winter

  • Plant range Afghanistan Himalaya

Characteristics

  • Foliage Semi-evergreen

  • Habit Clump-forming

  • 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

  • Partial Shade

  • Full Shade

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

  • Exposure Sheltered or Exposed

Soil

  • Chalk

    Sand

  • Chalk

    Chalk

  • Chalk

    Loam

  • Chalk

    Clay

  • MoistureMoist but well-drained

  • SoilSand, Chalk, Loam, Clay

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Outdoors grow in moderately fertile soil. Under glass grow in a mix of 1 part each of loam, medium grade bark, charcoal and lime chippings; 2 parts sharp sand; 3 parts leaf mould. Provide bright filtered light in medium to high humidity with good ventilation. When in growth apply a half strength balanced liquid fertiliser monthly. Remove damaged fronds in spring

Propagation Propagate by spores

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

How to care

Pruning No pruning required

Pests scale insects may be a problem under glass

Diseases Generally disease free

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