Corydalis schanginii subsp. ainae

RHS Plant Profile
long-flowered corydalis

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long-flowered corydalis RHS 1998
Alpine Rockery Bulbs

A tender tuberous perennial to 30cm, with divided foliage and lax racemes of fragrant bright yellow flowers, marked with dark brown in the mouth and with a slender white spur

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0-0.1 metre

Size

Time to Maturity
2–5 years
Max Spread
0-0.1 metre
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or East–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
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
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
C Asia

How to Grow

Cultivation

Ideally grown in sharply drained, moderately fertile soil in sun or partial shade in pots in an alpine house. Prefers more moisture in winter and partially drying out in summer, plant tubers in autumn. Plunge the pots in damp sand up to the collar of the pot to prevent drying out. Repot annually

Propagation

Propagate by allowing tubers to increase each year. Propagate by seed sown as soon as it is ripe in pots in an open frame; germination may be erratic

Suggested planting locations and garden types

  • Patio and container plants
  • Rock garden

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free