Papaveraceae
Scouler's fumewort: Ground Cover Plant
Corydalis scouleri
A low-maintenance shade perennial for cool, humus-rich, consistently moist soils. It dislikes heat and drought and will retreat into summer dormancy if it dries out — that is normal, not a sign of failure.
Every 3 days
Partial shade
4° - 24°C
55% - 85%
Categories
What is Scouler's fumewort?
Scouler's fumewort (Corydalis scouleri) is a medium-care plant from the Papaveraceae family. Corydalis scouleri, known as Scouler's fumewort, is a robust woodland perennial native to the coastal forests of Washington and Oregon, where it colonizes rich, moist bottomland along shaded stream banks. It forms broad clumps up to about 90 cm tall of tiered, lacy blue-green foliage, topped in spri...
Scouler's fumewort grows up to 90cm, spread of 90cm, watering every 3 days, 4°C – 24°C, 55–85% humidity. It is not suitable for indoor environments and not safe for pets.
Without precautions, ingestion can cause irritation in pets. Keep out of reach of cats and dogs.
How to Care for Scouler's fumewort?
TLDR: Scouler's fumewort needs Partial shade, watering every 3 days, and temperatures between 4-24°C with 55-85% humidity.
How Often Should You Water Scouler's fumewort?
Keep the root zone evenly moist to wet through spring and early summer and never let it dry out completely; watering can taper once the plant begins its natural late-summer dormancy.
How Much Light Does Scouler's fumewort Need?
Grow in dappled or partial to full shade, mimicking a woodland floor; shelter it from hot direct afternoon sun, which scorches the delicate foliage.
What Is the Best Soil for Scouler's fumewort?
Plant in deep, humus- and leaf-mould-rich soil that stays damp but drains freely; slightly acidic to neutral (pH ~5.5–7) is ideal, and heavy waterlogged soils invite root rot.
What Pot Should You Use for Scouler's fumewort?
Best planted in the ground in a woodland or shade garden; if grown in a container, choose a large, deep pot with excellent moisture retention and keep it out of direct sun.
Care Schedule
Fertilize
Every 30 days
What Is Scouler's fumewort and Where Does It Come From?
Corydalis scouleri, known as Scouler's fumewort, is a robust woodland perennial native to the coastal forests of Washington and Oregon, where it colonizes rich, moist bottomland along shaded stream banks. It forms broad clumps up to about 90 cm tall of tiered, lacy blue-green foliage, topped in spring and early summer by upright racemes of slender, spurred tubular flowers in pink to mauve. It typically goes dormant by late summer.
How to Propagate Scouler's fumewort?
Rhizome Division
- Keep the divided sections moist during the process
- Mark the spot as the plant will be dormant and invisible above ground
- 1 Locate Rhizomes
Carefully dig around the base of the plant after it has gone dormant in late summer or fall.
- 2 Divide Sections
Separate the fleshy rhizomes into sections, ensuring each piece has at least one growth bud.
- 3 Replant
Plant the sections 5-8 cm deep in moist, organic-rich soil and mulch well.
Materials needed:
Seed Sowing
- Seeds require a period of warm followed by cold to germinate
- Patience is required as germination can be erratic
- 1 Collect Fresh Seed
Harvest seeds as soon as the pods ripen; they lose viability quickly if dried out.
- 2 Cold Stratification
Sow seeds immediately in a cold frame to undergo natural winter chilling.
Materials needed:
How Big Does Scouler's fumewort Grow?
TLDR: Scouler's fumewort can reach up to 90cm tall with Medium growth rate.
Max height
90cm
Spread
90cm
Growth rate
Medium
Foliage
Deciduous
Warning: Toxic Plant
This plant can be toxic if ingested. Keep out of reach of:
Plant Uses
Ornamental
Great for decoration
Ground Cover
Soil coverage
Medicinal Uses
- Traditional topical use by some indigenous peoples for skin sores
- The genus Corydalis contains isoquinoline alkaloids studied for mild sedative and analgesic properties (not for self-administration)
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Scouler's fumewort?
TLDR: Scouler's fumewort is susceptible to 6 known diseases. Monitor regularly for early detection.
Aphids
Aphids are small, soft-bodied, pear-shaped insects (1/16 to 1/8 inch long) that feed by sucking nutrient-rich sap from plants. They reproduce rapidly and can quickly weaken plants, causing distorted growth and transmitting plant viruses. Aphids come in various colors including green, black, red, yellow, brown, and gray. They secrete honeydew, a sticky substance that attracts ants and encourages sooty mold growth.
Slugs and Snails
Slugs and snails are mollusks that feed on plant tissue, causing irregular holes in leaves and damage to young seedlings. They are most active at night and in moist conditions, leaving characteristic silvery slime trails. These pests can quickly devastate gardens, especially during wet seasons.
Rust
Rust is a common fungal disease caused by fungi in the order Pucciniales that affects a wide variety of plants. The disease gets its name from the characteristic orange, yellow, or reddish-brown pustules that appear on leaves, resembling metal rust. This obligate fungal parasite requires living plants to survive and can cause significant economic losses in agricultural crops.
Downy Mildew
Downy mildew is a fungal-like disease caused by oomycetes (water molds) that thrives in cool, wet conditions. It affects a wide range of plants, causing yellowing leaves with fuzzy white-gray growth underneath, leading to defoliation and reduced yields if left untreated.
Meaning & Symbolism
Associated with the quiet beauty of the deep forest and with resilience in cool, shaded places.
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Dark Fieldcap | Medium | Low light | 2d | ⚠️ |
| Azalea | Medium | Partial shade | 3d | ⚠️ |
| Muriel's Bamboo | Medium | Partial shade | 3d | ✓ |
| Bougainvillea | Medium | Direct sun | 7d | ⚠️ |
