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Corydalis 'Blue Line' (Corydalis 'Blue Line')

Other names: Fumewort 'Blue Line', Corydalis 'Couriblue'

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Variety or Cultivar
'Blue Line' is a mound-forming, herbaceous perennial bearing pinnate leaves with ovate, deeply scalloped, blue-green leaflets and upright, red-flushed stems bearing spike-like racemes of slender, tubular, fragrant, blue flowers from late spring into autumn.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
0.5 m 0.8 m 2-5 years
1 ft 2 ft 2-5 years

Where to grow

Soil type
  • Chalky
  • Clay
  • Loamy
  • Sandy
Soil drainage
  • Moist but well-drained
  • Moisture-retentive
Soil pH
  • Acid
  • Alkaline
  • Neutral
Sunlight
  • Partial Shade
  • Full Shade
Aspect
  • East
  • West
  • South
Exposure
  • Exposed
  • Sheltered

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Additional plant details

Cultivation

Grow in moderately fertile, humus-rich, moist but well-drained soil in partial shade. Prefers cool summer climates. Typically semi-dormant or dormant in summer. Cut back in summer if foliage dies back significantly. Mulch in autumn in cold areas.

Suggested uses

Containers/Patio, Rock, Beds and borders, Cottage/Informal, Underplanting, Woodland

UK hardiness

H5

USDA zones

Zone 6, Zone 7, Zone 8, Zone 9

Sunset zone

2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

WUCOLS

North-Central Coastal = Unknown
Central Valley = Unknown
South Coastal = Unknown
South Inland = Unknown
High and Intermediate Desert = Unknown
Low Desert = Unknown

Foliage

Deciduous

Habit

Cushion or Mound Forming

Native to

Garden origin

Drought tolerant

No

Flood tolerant

No

Toxicity

Not toxic

Plant care

Pruning

Cut back in summer if foliage is untidy. May sparsely rebloom in late summer or early autumn after cutting back.

Propagation methods

Division

Propagation

Sterile so plant does not set seed.

Pests

Slugs

Snails

Diseases

Plant in moist soil between autumn and spring

Cut back hard if becoming untidy through summer (optional)

Water regularly through dry periods

Divide and replant in spring

Protect in winter with dry mulch (in cold areas)

Plant in moist but well-drained soil (autumn or spring)

Plant in partial or full shade (autumn or spring)

Other plants

Plants in this Genus (0)

Corydalis

Companion plants (0)

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