Corydalis nobilis | Siberian corydalis

Siberian corydalis is the largest in the genus and it is stunning. Spicy-scented yellow and brown flowers top the glaucous ferny leaves for three-ish weeks from April to May. After bloom, plants set seed then go dormant in June. Happiest if kept moist in spring then reasonably dry during the dormant period. 

Fun fact: seeds are dispersed by ants who feast on elaiosomes, a high-fat nutrient that is attached to the seeds

Note: Plants will take a few years to become established and begin flowering.

Zones: 5 to 8
Family: Fumariaceae
Type: Perennial
Height: 18 to 24 in.
Spread: 12 to 18 in.
Exposure: full sun to part shade
Soil Conditions: average, humus rich, fertile, well-drained
Bloom Time: April to May 
Bloom Color: yellow-brown
Native Range: Siberia, Xinjiang and Kazakhstan