Corydalis curviflora subsp. rosthornii 'Blue Heron'
A compact, evergreen perennial forming a mound of finely-divided grey-green leaves and bearing fragrant, blue, tubular flowers clustered on upright red stems from late spring into early summer
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Blue | Green Grey Silver | ||
|---|---|---|---|---|
| Summer | Blue | Green Grey Silver | ||
| Autumn | Green Grey Silver | |||
| Winter | Green Grey Silver |
Position
- Partial shade
Aspect
East–facing or North–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H5Botanical details
- Family
- Papaveraceae
- Native to the UK
- No
- Foliage
- Evergreen
- 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
Accepted
How to grow
Cultivation
Grow in moderately fertile, moist but well-drained, humus-rich soil in partial shade
Propagation
Propagate by division
Suggested planting locations and garden types
- Cottage and informal garden
- Patio and container plants
- Rock garden
- Flower borders and beds
- Underplanting of roses and shrubs
Pruning
No pruning required
Pests
Generally pest-free but slugs and snails may damage young growth
Diseases
Generally disease-free
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