Polypodium cambricum (Cristatum Group) 'Grandiceps Fox'

RHS Plant Profile

Welsh polypody 'Grandiceps Fox'

RHS

Ferns

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A creeping deciduous fern with narrow, pinnate fronds to 40cm long, persisting into winter, with large branching crests at the frond apex and the tips of the pinnae

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 5–10 years
Max Spread: 0.5-1 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Chalk Loam Sand

Moisture: Moist but well–drained
pH: Alkaline or Neutral

Position

Full sun Partial shade

Aspect: South–facing or East–facing or West–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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Polypodiaceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Matforming
Genus: Polypodium can be evergreen or deciduous ferns, with creeping rhizomes bearing simple or pinnate fronds at intervals
Name Status: Accepted

How to Grow

Cultivation

Grow in moderately fertile, humus-rich, gritty or stoney, well-drained soil in sun or dappled shade. A fern for a neutral to alkaline soil, in a sheltered position

Propagation

Propagate by spores at 15-16°C (59-61°F) when ripe. Divide in spring or early summer

Suggested planting locations and garden types

City and courtyard gardens
Rock garden
Cottage and informal garden
Banks and slopes
Flower borders and beds
Ground cover
Underplanting of roses and shrubs

Pruning

Remove fronds as they become untidy

Pests

Generally pest-free

Diseases

Generally disease-free