When does Rock Harlequin bloom?

Corydalis sempervirens typically flowers from May through July, producing clusters of pink tubular blooms tipped in yellow.

What pollinators visit Rock Harlequin?

Bees and hummingbirds are the main visitors to Corydalis sempervirens, drawn to its tubular pink and yellow flowers during the summer bloom period.

What growing conditions does Rock Harlequin prefer?

This forb does best in part sun to part shade with low water needs, often taking root in thin, rocky or sandy soil along ledges, outcrops and open woodland edges.

Does Rock Harlequin spread easily in a garden bed?

Corydalis sempervirens is a short-lived biennial that self-seeds in lean, well-drained soil, so new plants often appear near the original planting site each year.

Is Rock Harlequin HOA-friendly?

Rock Harlequin takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Rock Harlequin

Name: Pollinator Patch
Author: Pollinator Patch

Corydalis sempervirens

Last reviewed: August 2026

Rock Harlequin (Corydalis sempervirens) is a slender forb that blooms pink and yellow from May through July on rocky ledges, dry banks and open woodland edges, attracting bees and hummingbirds.

Toxicity unknown

Rock Harlequin (Corydalis sempervirens) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

part sun

Water

low

Size

8"–24" H × 4"–12" W

Bloom

May, Jun, Jul

Native to

AL, CT, DE, GA and 23 more states

Pollinators

bees, hummingbirds

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Browse plants for this ecoregion

Piedmont Northern Forests Northern Lakes and Forests North Central Hardwood Forests Driftless Area Northeastern Highlands Northeastern Coastal Zone Northern Allegheny Plateau Northern Piedmont Blue Ridge Ridge and Valley Central Appalachians Western Allegheny Plateau Acadian Plains and Hills Eastern Great Lakes Lowlands

Rock harlequin is a delicate biennial wildflower that produces clusters of small pink and yellow tubular flowers from late spring through summer. This compact native plant forms neat clumps with finely divided, blue-green foliage that creates an airy, fern-like texture in the garden.

Growing Rock Harlequin

Grow Rock Harlequin in part sun and low water. Mature plants reach 8 to 24 inches tall and spread 4 to 12 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Rock Harlequin takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Biennial lifecycle creates gaps in plantings
Can appear weedy or wild to conventional gardeners
May self-seed unpredictably

Wildlife value

The tubular flowers attract bees and hummingbirds during its long blooming period from May through July. It provides habitat value for local pollinators.

Common questions

When does Rock Harlequin bloom?: Corydalis sempervirens typically flowers from May through July, producing clusters of pink tubular blooms tipped in yellow.
What pollinators visit Rock Harlequin?: Bees and hummingbirds are the main visitors to Corydalis sempervirens, drawn to its tubular pink and yellow flowers during the summer bloom period.
What growing conditions does Rock Harlequin prefer?: This forb does best in part sun to part shade with low water needs, often taking root in thin, rocky or sandy soil along ledges, outcrops and open woodland edges.
Does Rock Harlequin spread easily in a garden bed?: Corydalis sempervirens is a short-lived biennial that self-seeds in lean, well-drained soil, so new plants often appear near the original planting site each year.
Is Rock Harlequin HOA-friendly?: Rock Harlequin takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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