Corydalis flexuosa and relatives

Corydalis flexuosa was a great introduction in the 1990s, and it has also given rise to several excellent hybrids. They are all plants with delicate foliage growing through the winter, after a dormant season in late summer. Then in spring the stems are topped with the distinctive blue flowers, over a long flowering period. Each will soon form a good patch, which can be split to provide a lovely ground cover between shrubs.