Dryopteris stewartii

RHS Plant Profile
Stewart's wood fern

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A semi-evergreen, clump-forming fern with triangular to lance-shaped, green fronds divided into oblong leaflets (pinnae) with toothed or shallowly lobed margins. Fronds are yellow-green when young.

Position

Full shade, Partial shade

Soil Types

Loam, Clay, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

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

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
Semi evergreen
Habit
Clump forming
Genus
Dryopteris can be deciduous, semi-evergreen or evergreen ferns, with stout, erect or decumbent rhizomes and shuttlecock-like rosettes of lance-shaped to ovate, pinnately divided fronds
Name Status
Correct
Plant Range
Afghanistan to W Nepal

How to Grow

Cultivation

Easy to grow in most cool, moist, lightly shaded sites. Tolerant of dry shade but water regularly in their first season and mulch well while plant establishes. For mor information see our advice page 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

Generally not required. Can remove any faded fronds if required.

Pests

Generally pest-free

Diseases

Generally disease-free