| Common Name | Corydalis |
|---|---|
| Family | Papaveraceae |
| Genus | Corydalis |
| species | curviflora var. rosthornii |
| Plant Type | Perennial |
| US Patent # | -- |
| EU Grant # | -- |
| Bloom Time | May, June, July |
| Flower Color | Blue |
| Foliage Color | Blue, Green |
| Dormancy | Winter |
| Exposure | Part Shade, Full Shade |
| Growth Habit | Clumping |
| Growth Rate | Moderate |
| Hardiness Zone | 6, 7, 8 |
| 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 | Spring |
| Persistence | Deciduous |
| Size (HT/W/FL HT) | 8" / 10" / 9" |
| Soil (Garden) | Average, well-drained. |
| Water (Garden) | Keep evenly moist, not wet. |
| Special Uses | Fragrant |
| Comments | Recommend transplanting to a 4" pot from a 72 cell size, not a larger size container. |
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
| 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 |
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Photo(s) courtesy of TERRA NOVA® Nurseries, Inc.
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