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Osmunda regalis 'Cristata' AGM

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© RHS

Characteristics

Plant type

Fern

Habit

Bushy

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Foliage

Brown and Red in Autumn
Green in Spring and Summer

Size

Ultimate height

1-1.5 metres

Ultimate spread

1-1.5 metres

Time to ultimate height

5-10 years


Preferred common name

royal fern 'Cristata'

Family

Osmundaceae


Osmunda are medium-sized to large deciduous ferns, usually from wet places, with erect or arching, pinnate or bipinnate fronds, bearing spores either on modified pinnae or on separate, smaller fronds

'Cristata' is a robust deciduous fern, slowly forming a massive clump, with fronds bipinnately divided, the fronds, pinnae and pinnules forked or crested at the tips; fertile fronds are tipped with rusty-brown spore-bearing segments in summer

How to grow

Sunlight

  • Full sun
  • Part shade
  • Full shade

Aspect

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

Cultivation

Easy to grow in most cool, moist, lightly shaded sites and will grow in full sun if given plenty of moisture. Will tolerate alkaline soils if plenty of fibrous compost is incorporated. Useful for very wet sites

Soil

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

Propagation

Propagate by division in early spring or autumn

Suggested planting locations and garden types

City/Courtyard Gardens, Cottage/Informal Garden or Flower borders and beds


How to care

Pruning

Dead or damaged fronds may be removed as necessary

Pests

Generally pest free outdoors

Diseases

Generally disease free outdoors