3 named cultivars

perennial

Blue Corydalis

Corydalis flexuosa

The Story

Plant Bio

Corydalis flexuosa is a perennial with delicate, fern-like foliage and attractive blue flowers.

It is noted for its graceful arching habit and preference for shaded areas.

Uses & Benefits:

Corydalis flexuosa offers delicate, fern-like foliage and charming blue flowers, perfect for shaded borders and woodland gardens.

Provides ground cover in shaded areas, reducing soil erosion and suppressing weeds.

Supports pollinators like bees with its vibrant blooms and contributes to biodiversity.

Essentials

At a Glance

Plant Type

Perennial

Height

12 inches

Width

12 inches

Light

Partial Sun, Shade

Zones

5, 6, 7, 8

Water

Consistent moisture, well-drained soil

Humidity

Prefers moderate humidity

Lifespan

Perennial

Native To

China

Toxicity

Toxic if ingested

Planting

How to Grow

Tuck seeds into well-drained soil in early spring for best germination.
Mist cuttings regularly to maintain humidity and encourage rooting.
Water consistently, keeping soil moist but not waterlogged.
Apply a balanced fertilizer in early spring to promote healthy growth.
Prune dead or damaged stems after flowering to maintain shape.
Divide clumps every 2-3 years in early spring to rejuvenate the plant.

Pro Tip

Use a shade cloth during hot summer days to protect delicate foliage.

Keep It Thriving

Care Guide

Do

Ensure soil remains moist during active growth 🌱
Mulch around roots to retain moisture and suppress weeds
Fertilize lightly in early spring for vigorous blooming

Don't

Avoid overwatering, which can cause root rot ❌
Do not expose to full, harsh sunlight in peak summer
Refrain from heavy pruning during dormancy

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Mulch
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded woodland garden with delicate fern-like foliageWildflower meadow border with soft, flowing textures

Companion Plants

Hosta Astilbe TrilliumFern Bleeding Heart

Multiply

Propagation Methods

Good to Know

Common Questions

Blue Corydalis questions

What zones can Blue Corydalis grow in?

Blue Corydalis is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Blue Corydalis deer resistant?

Yes — Blue Corydalis is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Blue Corydalis bloom?

Blue Corydalis typically blooms in early spring through mid-spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Blue Corydalis need full sun?

Blue Corydalis does best in part shade.