|species||curviflora var. rosthornii|
|US Patent #||--|
|EU Grant #||--|
|Bloom Time||May, June, July|
|Foliage Color||Blue, Green|
|Exposure||Part Shade, Full Shade|
|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|
|Size (HT/W/FL HT)||8" / 10" / 9"|
|Soil (Garden)||Average, well-drained.|
|Water (Garden)||Keep evenly moist, not wet.|
|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.
|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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