Corydalis Ceiranthusdia

These colorful flowers grow happily in a shade garden or woodland setting. They're reliable bloomers with flowers appearing over several months beginning in spring, and their lacy foliage remains attractive throughout a long season. Deadhead the flowers to keep the plants looking neat and to keep foliage healthy. Some varieties may have a tendency towards more evergreen foliage. The plants self-sow and spread fairly quickly, so divide the clumps every few years to keep them under control as needed.
Light
Corydalis are shade lovers, and useful to brighten up shady spots in your garden with color. They can tolerate some sun, but afternoon sun would probably be too much for them, especially in zone 7 during hotter summer temperatures.
Soil
Corydalis flowers like a rich well-drained soil that is not too moist. The roots can be subject to root rot if soil stays too wet, and if your corydalis does not overwinter, either you live in a zone that is too cold (below 5) and/or the soil is too wet and the roots stay frozen.