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Polystichum tsussimense AGM

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© RHS 2002

Characteristics

Plant type

Fern

Habit

Tufted

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Foliage

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

5-10 years


Preferred common name

Korean rock fern

Family

Dryopteridaceae


Polystichum are mostly evergreen or semi-evergreen ferns, with short stout rhizomes and pinnately divided fronds in neat shuttlecock-like rosettes

P. tsussimense is a small tufted evergreen fern to 45cm, with erect, narrowly lance-shaped, bipinnate fronds, with slender-pointed apex and pinnae

Synonym(s)

  • Aspidium tsussimense

How to grow

Sunlight

  • Part shade
  • Full shade

Aspect

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

Cultivation

Easy to grow in most cool, fertile, moist, humus-rich, shaded soils. Protect crowns from excessive winter wet

Soil

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

Propagation

Propagate by sowing spores as soon as ripe, division of rhizomes in spring or by bulbils in autumn

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds, Low Maintenance, Rock Garden or Underplanting of Roses and Shrubs


How to care

Pruning

Dead or damaged fronds may be removed as necessary

Pests

Generally pest free outdoors

Diseases

Generally disease free