• 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

Pellaea rotundifolia

button fern

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
button fern

© RHS

  • Other common names button fern
    New Zealand cliff brake

  • Family Pteridaceae

  • Genus Pellaea can be evergreen or deciduous, tufted ferns with pinnate to tripinnate fronds

  • Details P. rotundifolia is a compact, evergreen fern forming a nearly flat rosette of pinnate fronds to 25cm long, composed of rounded, deep green leaflets borne on dark brown, pink-scaled stems

  • Plant range New Zealand

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • 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)

    H2

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Sand

    Sand

  • MoistureMoist but well-drained

  • SoilLoam, Sand

  • pHAcid

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 Requires a moderately fertile, ericaceous, moist but well-drained soil in full sun with protection from hot midday sun, or partial shade. In frost prone areas protect the crown with a dry winter mulch

Propagation Propagate by spores sown at 13-18°C when ripe

Suggested planting locations and garden types Patio & Container Plants

How to care

Pruning Remove old leaves as they die down for the winter

Pests Generally trouble free

Diseases Generally trouble free

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