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Asplenium scolopendrium (Crispum Group) 'Crispum Bolton's Nobile'

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© RHS

Characteristics

Plant type

Fern

Habit

Bushy

Resilience

Hardiness

old H4 (hardy)

Colour

Foliage

Dark Green in Autumn, Spring, Summer and Winter

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

hart's tongue fern 'Crispum Bolton's Nobile'

Family

Aspleniaceae


Asplenium are evergreen ferns with short, usually erect rhizomes bearing a rosette of slightly leathery fronds which may be simple, pinnate to 3-pinnate

'Crispum Bolton's Nobile' is an evergreen fern forming a handsome rosette of broad, rich green, strap-like fronds to 30 by 10cm, with strongly undulate margins; sterile

How to grow

Sunlight

  • Part shade
  • Full shade

Aspect

  • South-facing, North-facing, West-facing or East-facing
  • Exposed or Sheltered

Cultivation

Grows well in humus-rich, moist but well-drained soil. Bright mid-day sun can cause damage. May be sensitive to fungicides.Tolerant of dry shade but water regularly during the first season and mulch well

Soil

  • Moist but well-drained
  • Alkaline or Neutral
  • Sand, Clay, Chalk or Loam

Propagation

Propagate by division in spring. Peeled leaf bases can be taken off from where the stem joins with the root. Old leaf bases that are green at the base are incubated in a plastic bag of loam based media. Green swellings can be found and potted to raise new plants

Suggested planting locations and garden types

Banks and Slopes, City/Courtyard Gardens, Cottage/Informal Garden, Flower borders and beds, Ground Cover or Patio/Container Plants


How to care

Pruning

Dead or damaged fronds may be removed as necessary

Pests

Generally pest free outdoors

Diseases

May be infected by a rust in mild, damp winters