Corydalis calycosa
corydalis
- 9cm pot
- £11.99
- In stock (shipped within 2-3 working days)
- 3 × 9cm pots
- £27.99 £9.33 each
- In stock (shipped within 2-3 working days)
Delivery options
- Standard £5.99
- Position: partial shade
- Soil: moderately fertile, moist but well-drained soil
- Rate of growth: average
- Flowering period: May to July
- Hardiness: fully hardy
This mound-forming perennial is known for its striking, true blue and purple-hued flowers with a white throat, which are sweetly scented and appear in dense racemes during summer. The fern-like, deeply cut bright-green foliage adds an attractive, bushy texture to the plant, making Corydalis calycosa a standout in shaded borders or woodland gardens.
Select a cool, partially shaded location with well-draining, humus-rich soil. Plant in early spring or fall, spacing 15-30cm (6-12in) apart. Maintain consistent moisture, especially during the spring growing season, and apply a 5-7cm (2-3in) layer of organic mulch to retain moisture and keep roots cool. Feed with a balanced, slow-release fertiliser in early spring. Many Corydalis species enter dormancy during hot, dry summers, so reduce watering but don't let roots dry out completely. In autumn, cut back stems to near ground level, doing so earlier if self-seeding is a concern. Monitor for slug and snail damage, especially on young growth.
