Pseudocodon grey-wilsonii

RHS Plant Profile
Grey-Wilson bonnet bellflower

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Synonyms

Codonopsis forrestii misapplied
Pseudocodon convolvulaceus subsp. forrestii misapplied
Codonopsis nepalensis Grey-Wilson
Codonopsis convolvulacea misapplied
Pseudocodon convolvulaceus misapplied
Codonopsis grey-wilsonii

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Alpine Rockery Herbaceous Perennial
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A twining herbaceous perennial climber growing from tubers, to a height of 3m, with green heart-shaped leaves and star-shaped rich blue flowers with a mauve centre in summer

Position

Partial shade

Soil Types

Loam, Chalk, Clay, Sand

Max Height

1.5-2.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
1.5-2.5 metres

Growing Conditions

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

Position

Partial shade
Aspect
East–facing or North–facing or West–facing
Exposure
Exposed or 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
Campanulaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Climbing
Genus
Name Status
Correct

How to Grow

Cultivation

Grow in woodland conditions of partial shade and moist, humus-rich, well-drained soil

Propagation

Propagate by seed in autumn or spring outside in a cold frame

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Conservatory and greenhouse
  • Flower borders and beds
  • Wall side borders

Pruning

No pruning required other than cutting back old growth in autumn

Pests

May be susceptible to damage by slugs and snails. May also be susceptible to glasshouse red spider mite under glass

Diseases

Generally disease-free