Hollowroot Plant Care

Hollowroot (Corydalis cava) belongs to the Papaveraceae family within the Corydalis genus. Hollowroot is native to moist, shady, woodland habitats throughout most of mainland Europe. Hollowroot is also known as Fumewort.

Hollowroot displays a spreading, low-growing perennial growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Hollowroot produces unique spurred flowers in shades of pink, purple, or yellow.

Leaf size: approximately 3 inches.

Corydalis cava requires watering every 2–3 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Hollowroot thrives in partial to full shade. The optimal light range is 100–1,000 lux. Avoid placing Hollowroot in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Corydalis cava grows best at temperatures of 50–75°F. Hollowroot prefers humidity levels of 40–60%.

Moist, well-draining soil with added organic matter like compost or peat moss. Good drainage is essential for Hollowroot to prevent waterlogging, which leads to root rot and fungal issues.

Feed Hollowroot every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.

Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Divide and repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Hollowroot can be propagated through seeds, division of rhizomes. Similar propagation techniques also apply to caucasian corydalis plant care, which shares the same genus.

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Hollowroot is susceptible to slugs, snails, aphids. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Hollowroot grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Hollowroot is native to moist, shady, woodland habitats throughout most of mainland Europe. In cooler regions, grow Hollowroot as a houseplant or bring it indoors before the first frost.