Corydalis 'Blue Heron'Corydalis 'Blue Heron'

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.

USDA Hardiness Zone(s): 6-8
Size (HT/W/FL HT): 8″ / 10″ / 9″
Exposure: Part Shade, Full Shade
Bloom Time(s): May, June, July

Common Name






curviflora var. rosthornii

Plant Type

US Patent #

EU Grant #

Bloom Time

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Flower Color

Foliage Color






Growth Habit

Growth Rate

Hardiness Zone

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How Different?

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.

Landscape Value

Use in the shade garden, in a mass planting or edging, as an under-story plant in the woodland, or in a container.

Most Active Growing Season



Size (HT/W/FL HT)

8" / 10" / 9"

Soil (Garden)

Average, well-drained.

Water (Garden)

Keep evenly moist, not wet.

Special Uses


Recommend transplanting to a 4" pot from a 72 cell size, not a larger size container.

Water (Greenhouse) Dry moderately between waterings.
EC 0.5 – 0.7
pH 5.4 – 6.6
Fertility Needs 50 – 75 ppm
Notes USE NO CHEMICALS ON CORYDALIS without prior experience. We recommend transplanting to a 4″ pot from a plug, not a larger size container.
Finish Time to 4″ 6 – 8 weeks
Finish Time to Gallon
Day Length for Flowering Long Day
Corydalis 'Blue Heron' - Product Profile
Corydalis 'Blue Heron' - Growing Recipe

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