curviflora var. rosthornii
|US Patent #||
|EU Grant #||
|Size (HT/W/FL HT)||
8" / 10" / 9"
|Most Active Growing Season|
5.6 – 6.6
Dormant in winter.
Dry moderately between waterings.
Keep evenly moist, not wet.
It has blue green rather than green leaves, and larger, darker blue flowers. It holds up better in the summer heat than the C. flexuosa types.
Use in the shade garden, in a mass planting or edging, as an under-story plant in the woodland, or in a container.
|Finish Time to 4"||
6 – 8 weeks
Recommend transplanting to a 4" pot from a 72 cell size, not a larger size container.
USE NO CHEMICALS ON CORYDALIS without prior experience.
Corydalis ‘Blue Heron’
Our darkest blooming Corydalis features the largest flowers in our collection! Dark gentian-blue flowers float atop stunning red stems and are enhanced by the blue green foliage. This form bloomed all spring and summer for us in Oregon. A marvelous Corydalis collected in Sichuan, China by Mr. Dan Hinkley. Will go summer dormant if it is kept too dry or hot.