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Corydalis cava
Hollowroot
Corydalis cava
Corydalis cava is a herbaceous perennial plant native to Europe. It is known for its hollow stems and delicate, fern-like foliage. It produces attractive purple, pink, or white spurred flowers in early spring. The plant goes dormant in summer. The root is a tuber, and can develop into a substantial size over several years.
CategoryDetails
Plant TypePerennial plant
Estimated Plant Lifespan5 years lifespan
Toxic to humansToxic to humans
ToxicityToxic to: Dogs, Cats, Livestock
Sun Requirements2-4 hours direct sunlight (Partial Shade)
Pollination

Method: Animal

Notes: Pollinated by bees and other insects. Can be manually pollinated to increase seed production, although not commonly done.

Watering Requirements

Method: Water at the base of the plant

Frequency: Water when the top inch of soil feels dry.

Notes: Avoid overwatering, as this can lead to root rot. Corydalis prefers consistently moist but not waterlogged soil.

Humidity Requirements

Level: Moderate

Maintenance: No special methods are typically needed. Adequate air circulation is important, especially in humid environments.

Temperature Range

Min: -15°C

Max: 25°C

Hepatica nobilis
Liverleaf
Hepatica nobilis
Similar light and moisture requirements. Liverleaf's foliage provides visual interest after the corydalis has gone dormant.
Trillium grandiflorum
large white trillium
Trillium grandiflorum
These woodland plants have similar needs and bloom at the same time, creating a beautiful display.
Lamium galeobdolon
yellow archangel
Lamium galeobdolon

Yellow archangel is an aggressive spreader and can quickly outcompete Corydalis cava for resources, potentially smothering it.

Slugs and Snails

These pests can feed on the foliage, causing ragged holes in the leaves. Slugs are especially prevalent in damp conditions.

Steps:

    • Division: Divide established clumps in late summer or early fall after the foliage has died back.
    • Gently dig up the tuberous roots.
    • Carefully separate the tubers, ensuring each division has some roots and buds.
    • Replant the divisions in the desired location.
    • Seed: Collect seeds from mature seed pods.
    • Sow seeds in the fall, either directly into the garden or in seed trays.
    • Keep the soil consistently moist until germination.

Slug and Snail Bait

To control slug and snail populations, protecting the foliage.

Mycorrhizal Fungi Inoculant

To improve nutrient uptake and overall plant health, especially if the soil is not already rich in mycorrhizae.