Corydalis flexuosa 'China Blue'

RHS Plant Profile
corydalis 'China Blue'
corydalis 'China Blue' RHS
Alpine Rockery Herbaceous Perennial

A rhizomatous perennial forming a mat of divided, purple-tinged leaves that die down in summer, wth 2-lipped light blue flowers 2.5cm long in clusters of leafy stems to 30cm tall, 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 East–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H5

Colour & Scent

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 or by division in autumn

Suggested planting locations and garden types

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

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free