Solid-bulbed corydalis
Corydalis solida · Papaveraceae
The gardener's calendar
Ideal time to plant solid-bulbed corydalis: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Flowering
- February to April
- Adult size
- 15 to 25 cm tall
- Foliage
- Deciduous, disappears after flowering
- Hardiness
- Down to -15°C
- Growth
- Rapid in spring
- Origin
- Central and Eastern Europe
- Soil type
- Well-draining, rich in humus
Care
Light exposure
Prefer partial shade or dappled shade, ideally under deciduous trees. Corydalis tolerates shaded areas as well but will flower less abundantly in full sun. An east-west facing location protected from the hot midday sun is optimal.
Soil and drainage
Soil rich in organic matter and well-draining is essential to prevent bulb rot. Improve heavy soil with compost or peat. Corydalis appreciates slightly acidic to neutral pH.
Watering
Keep the soil moist during growth and flowering (February to May). Once foliage fades, significantly reduce watering as the bulb enters summer dormancy. In autumn, water only moderately.
Fertilizing
A light application of balanced fertilizer in spring, at the time of growth resumption, is ample. Prefer a formulation low in nitrogen to encourage flowering rather than foliage.
Deadheading and foliage removal
Cut faded flower stems to encourage better flowering the following year. Allow foliage to yellow naturally before removing it, as it replenishes the bulb's reserves.
Health and pests
Corydalis is generally robust but dislikes excessive moisture which promotes bulb rot. Ensure impeccable drainage. Few pests target it, but watch for slugs in spring.
Did you know?
Solid bulb corydalis was once cultivated in Europe for the extraction of alkaloids used in traditional medicine to relieve pain. Its scientific name Corydalis means 'helmet' in Greek, referring to the characteristic shape of its flower which resembles a small medieval helm.
Where to buy it
Plant the bulbs in autumn for spring flowering. Pick a plant with healthy foliage and roots that are not exposed. Best time: from September to November.
Add this plant to my garden →Plants from the same family
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Tips generated and checked by Viridia — adapt them to your local climate.