Polystichum tsussimense 'K Rex'

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An evergreen, clump-forming fern with erect, narrowly lance-shaped, bipinnate fronds, with slender-pointed apex and leaflets. This cultivar has fronds almost twice the size of the species.

Position

Full shade, Partial shade

Soil Types

Loam, Clay, Chalk, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
5–10 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

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

Position

Full shade 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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Dryopteridaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Clump forming
Genus
Polystichum are mostly evergreen or semi-evergreen ferns, with short stout rhizomes and pinnately divided fronds in neat shuttlecock-like rosettes
Name Status
Unresolved

How to Grow

Cultivation

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

Propagation

Propagate by division

Suggested planting locations and garden types

  • Cottage and informal garden
  • Low Maintenance
  • Flower borders and beds
  • Underplanting of roses and shrubs

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free