Corydalis curviflora subsp. rosthornii 'Blue Heron'

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Key characteristics

Family: Papaveraceae
Height: 8–10 in
Width: 8–12 in
Flower color: Deep or sapphire blue, often fragrant
Foliage color: Blue-green to gray-green
Bloom time: Late spring through early summer
Light: Partial shade to full shade
Water: Evenly moist, well-drained soil
Maintenance: Low; deadhead to prolong bloom, divide periodically, and protect from summer heat or drought dormancy
Growing zone: USDA zones 6–8
Wildlife: Butterflies and other pollinators

Perennials

Corydalis curviflora subsp. rosthornii 'Blue Heron'

Blue Heron Corydalis

Corydalis curviflora subsp. rosthornii 'Blue Heron' forms soft mounds of finely divided, fernlike foliage that set off arching sprays of deep blue, tubular flowers in late spring, often continuing into early summer. Each gently curved bloom carries pale inner tones that create a luminous, airy effect in shaded garden settings. Native to woodland regions of western China, this refined selection reflects the cool mountain habitats where the species was first gathered and later brought into cultivation.

Light

Partial shade to full shade

Water

Evenly moist, well-drained soil

Bloom time

Late spring through early summer

Find this plant

Works well in

Borders
Shade Gardens
Woodland Gardens
Pollinator Gardens
Rain Gardens

Companion plants

Epimediums · Hostas · Bleeding hearts · Solomon's seal · Ferns · Lungworts

Design tip

Summer flowers carry the middle of the season, so place it where the bed needs color once spring bulbs fade. Keep it out of hot afternoon sun and layer it with woodland companions for a full, settled look.