Corydalis 'Craigton Blue'

RHS Plant Profile
corydalis 'Craigton Blue'
corydalis 'Craigton Blue' RHS

Synonyms

Corydalis flexuosa 'Craighton Blue'

Alpine Rockery Herbaceous Perennial

A rhizomatous, herbaceous perennial, with divided, mid-green leaves which die down in summer. Bright blue, tubular, 2-lipped flowers, 4cm long, are produced in clusters on red stems, up to 40cm in height, in late spring and early summer

Position

Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Partial shade
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed or Sheltered
Hardiness
H5

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Papaveraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Matforming
Genus
Corydalis can be annuals, biennials or tuberous or rhizomatous perennials, with ternately or pinnately lobed leaves and racemes of spurred, tubular flowers
Name Status
Accepted

How to Grow

Cultivation

Grow in moderately fertile, humus-rich soil

Propagation

Propagate by seed sown in containers in an open frame when ripe (cultivars may not come true) or by division in autumn

Suggested planting locations and garden types

  • City and courtyard gardens
  • Rock garden
  • Cottage and informal garden
  • Patio and container plants
  • Ground cover
  • Flower borders and beds
  • Underplanting of roses and shrubs

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free