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Ferns

Asplenium scolopendrium Undulatum Group

An evergreen, hardy fern growing to around 50cm producing rich green fronds with undulating margins

Synonyms

Asplenium scolopendrium 'Undulatum'

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Ultimate height

0.1–0.5 metres

Time to ultimate height

5–10 years

Ultimate spread

0.5–1 metres

Clay

Loam

Chalk

Sand

Moisture

Moist but well–drained, Well–drained

pH

Neutral, Alkaline

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full shade
Partial shade

Aspect

North–facing or West–facing or East–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)

Botanical details

Family: Aspleniaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Clump forming
Genus: Asplenium are evergreen ferns with short, usually erect rhizomes bearing a rosette of slightly leathery fronds which may be simple, pinnate to 3-pinnate
Name status: Accepted

How to grow

Cultivation

Grow in humus-rich, moist but well-drained soil, with added grit, in partial shade. See how to grow ferns for further advice

Propagation

Propagate by division, or propagate by sowing spores as soon as ripe at 15°C

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Low Maintenance
Banks and slopes
Flower borders and beds
Underplanting of roses and shrubs

Pruning

No pruning required but can remove older fading leaves if necessary

Pests

Generally pest-free

Diseases

Generally disease-free

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