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Herbaceous Perennial

Corydalis flexuosa

blue corydalis

A herbaceous perennial to 30cm in height, dying down in summer, with divided glaucous leaves, sometimes tinged purple, and clusters of two-lipped blue flowers with white throats in spring and early summer

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Blue Blue Green Purple
Summer Blue
Autumn
Winter
Position
  • Partial shade
Aspect

West–facing or South–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H5
Botanical details
Family
Papaveraceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Clump forming
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

Correct

Plant range
China

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
  • Wildflower meadow
  • Cottage and informal garden
  • Rock garden
  • Underplanting of roses and shrubs
  • Flower borders and beds
Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free

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