Coniogramme intermedia

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An evergreen fern, rare in cultivation, about 60-90cm tall, with a short-creeping rhizome and long, lance-shaped glossy, dark green pinnate fronds

Position

Full shade, Partial shade

Soil Types

Clay, Loam

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

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

Position

Full shade Partial shade
Aspect
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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Pteridaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Clump forming
Genus
Coniogramme are a genus of around 40 clump-forming, evergreen, semi-evergreen or deciduous, terrestrial ferns suited to moist, shady or woodland areas.
Name Status
Correct
Plant Range
N India to Japan

How to Grow

Cultivation

Grow in fertile, moist but well-drained, neutral to acid leafy soil in part or full shade with shelter from cold winds. See how to grow ferns for further advice

Propagation

Propagate by spores as soon as ripe, or propagate by division of rhizomes on well-established clumps

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Flower borders and beds

Pruning

No pruning required, tidy dead or damaged fronds

Pests

May be susceptible to damage from slugs

Diseases

Generally disease-free