Corydalis Blue Heron is a relatively new introduction from its native China, and very beautiful, with finely divided blue grey foliage and dangling tubular flowers of exquisite sapphire blue. Plus, they’re lightly scented. A fantastic sight in spring and beyond. Likes some shade. Any reasonable soil but not too dry. 12 in. 1 litre pot.
Last few available
Or, to give it its full name Corydalis Curviflora ssp. Rosthornii Blue Heron. Yup. just as we thought. Best to stick to the shortened form.
This very brief video clip shows off Corydalis Blue Heron plants in the glasshouses of the big US nursery Wayside Gardens:
Corydalis Blue Heron is a hardy perennial with purple tinted ferny foliage and sapphire blue tubular flowers in spring into summer suitable for light shade.