Corydalis 'Blue Heron'

Corydaliscurviflora var. rosthornii

Family
Papaveraceae (pa-pav-er-AY-see-ee)
Genus
Corydalis (kor-ID-ah-liss)
Synonym
Sun Exposure
Light Shade
Foliage
Herbaceous
Height
6-12 in. (15-30 cm)
Spacing
9-12 in. (22-30 cm)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Danger
Parts of plant are poisonous if ingested
Bloom Color
Dark Blue
Bloom Time
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Blue-Green
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

Norristown, Pennsylvania

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Gardener's Notes:

0
positive
3
neutrals
1
negative
Sort By:
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C
ROSLINDALE, MA | April 2015 | neutral

This is a difficult plant to grow in my climate (Boston Z6a). I haven't succeeded in wintering it over.

The trick in grow...Read More

A
Philadelphia, PA | April 2015 | negative

I first saw this plant growing vigorously in a Seattle garden. I brought some starts home to Philadelphia, and put them in the ground a...Read More

C
Longmont, CO | May 2014 | neutral

The image posted by anglibet is of Corydalis flexulosa "Blue Panda" - the item I searched for, and found this 'blue heron' entry instead....Read More

N
Garland, TX (Zone 8a) | February 2006 | neutral

It's only been a few weeks since I received this plant from Heronswood, but I'm already impressed. What a marvelous, clear, brilliant blu...Read More

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