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Alpine RockeryBulbs

Corydalis schanginii subsp. ainae

long-flowered corydalis

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

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0–0.1 metre

Chalk

Loam

Sand

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

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)

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

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