Swan Lily Plant Care
Cyanella cygnea G.Scott
Updated · Sources · How we source care data
Cyanella cygnea is a perennial flowering plant and geophyte that belongs to the genus Cyanella and is part of the Renosterveld. The plant is endemic to the Northern Cape and occurs from the Richtersveld to Komaggas where it has an area of occurrence of 4,775 km2.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Swan Lily?
Water Swan Lily every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–80°F (10–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
What Is the Swan Lily?
Swan Lily (Cyanella cygnea) belongs to the Tecophilaeaceae family within the Cyanella genus. Swan Lily is native to the Northern Cape and occurs from the Richtersveld to Komaggas.
Swan Lily displays a clumping perennial herb growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. Swan Lily produces showy blue or purple flowers in clusters.
Leaf size: approximately 6 inches.
How Often Should You Water a Swan Lily?
Cyanella cygnea requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Swan Lily Need?
Swan Lily thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Swan Lily Prefer?
Cyanella cygnea grows best at temperatures of 50–80°F. Swan Lily prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Swan Lily?
Well-draining sandy soil with added organic matter for nutrients. Good drainage is essential for Swan Lily to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Swan Lily?
Feed Swan Lily 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.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Swan Lily?
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.
How Do You Propagate a Swan Lily?
Swan Lily can be propagated through seeds, division of offsets. Similar propagation techniques also apply to cyanella alba plant care, which shares the same genus.
Is the Swan Lily Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Swan Lily, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Swan Lily?
Swan Lily is susceptible to aphids, thrips, spider mites. 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.
What USDA Hardiness Zone Does the Swan Lily Need?
Swan Lily grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Swan Lily is native to the Northern Cape and occurs from the Richtersveld to Komaggas. In cooler regions, grow Swan Lily as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Swan Lily is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Cyanella genus (family Tecophilaeaceae) — search all Cyanella species in the plant lookup.
Swan Lily thrives in bright light and direct sun — see other bright-light plants.
More Cyanella Species
Other Cyanella species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Cyanella cygnea G.Scott, family Tecophilaeaceae (first published in S. African J. Bot. 57: 50 (1991)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Swan Lily, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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