Adiantum raddianum 'Brilliantelse'

RHS Plant Profile
Delta maidenhair fern 'Brilliantelse'

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Ferns Conservatory Greenhouse Houseplants

A semi-evergreen fern to 50cm, that can be evergreen when grown as a houseplant, with smooth black stalks bearing fronds composed of light green, rounded, lobed segments. The leaflets display a pink to red colouration in spring before turning green

Position

Partial shade

Soil Types

Loam

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
Moisture
Moist but well–drained
pH
Neutral or Alkaline

Position

Partial shade
Aspect
West–facing or East–facing or North–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)
H1C

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Pteridaceae
Native to GB/Ireland
No
Foliage
Semi evergreen, Evergreen
Habit
Clump forming
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
Accepted

How to Grow

Cultivation

Grow as a house or conservatory plant indoors in a peat-free houseplant compost. Position the container in bright, indirect light with good ventilation. Water freely and apply a half strength, general liquid feed monthly from mid spring to late summer. Provide high humidity by placing the container on a tray of moist gravel or pebbles. Water sparingly in winter. See how to grow ferns as houseplants for further information

Propagation

Propagate by division of the rhizomes in early spring

Suggested planting locations and garden types

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

Pruning

Can trim back any faded growth in winter if required or wait for new growth to start emerging in spring

Pests

May be susceptible to scale insects

Diseases

Generally disease-free