Corydalis malkensis

RHS Plant Profile

Malka corydalis

RHS 1998

Other common names

alexeenkoana of gardens

Synonyms

Corydalis caucasica var. alba misapplied

Bulbs Alpine Rockery

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A tuberous-rooted herbaceous perennial to 15cm in height, with pale green leaves palmately divided into narrow segments, and erect racemes of white, tubular flowers 2cm in length, with broad lips

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: East–facing or South–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

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: Caucasus

How to Grow

Cultivation

Grow in sharply drained, moderately fertile soil in sun or partial shade in a rock garden, or grow in pots in an alpine house. Prefers more moisture in winter and partially drying out in summer, plant tubers in autumn, if using pots 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

Gravel garden
Patio and container plants
Rock garden
City and courtyard gardens
Cottage and informal garden
Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free