Adiantum × mairisii

RHS Plant Profile
Mairis maidenhair fern

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Mairis maidenhair fern John Fielding

Synonyms

Adiantum capillus-veneris 'Mairisii'

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Ferns
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A small and elegant looking deciduous fern with lacy, airy bright green fronds supported on dark stipes or stems.

Position

Partial shade

Soil Types

Loam, Clay, Chalk

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Loam Clay Chalk
Moisture
Moist but well–drained
pH
Neutral or Acid or Alkaline

Position

Partial shade
Aspect
West–facing or East–facing
Exposure
Sheltered
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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Pteridaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming, Matforming
Potentially harmful
Harmful if eaten. Wear gloves and other protective equipment when handling. Pets: Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
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
Name Status
Correct

How to Grow

Cultivation

Plant in a moist but free draining soil in partial shade. Makes an effective shady border edging.

Propagation

Propagate by division

Suggested planting locations and garden types

  • Patio and container plants
  • Cottage and informal garden
  • Low Maintenance
  • Underplanting of roses and shrubs
  • Ground cover
  • Garden edging
  • Flower borders and beds

Pruning

Can trim back faded growth in winter or wait for new growth to start emerging in spring.

Pests

Generally pest-free

Diseases

Generally disease-free