Lyon's Ragwort Plant Care
Senecio lyonii A.Gray ex Lyon
Updated · Sources · How we source care data
Senecio lyonii is an uncommon species of flowering plant in the aster family known by the common name island senecio. This island endemic is known only from Guadalupe Island off the coast of Baja California and two of the Channel Islands of California, Catalina and San Clemente Islands.
Every 7–14 days
Bright indirect light to full sun
50–80°F
40–60%
At a glance
How do you care for Lyon's Ragwort?
Water Lyon's Ragwort every 7–14 days, letting the top layer of soil dry out between waterings, and give it bright indirect light to full sun. It prefers temperatures of 50–80°F (10–27°C) and 40–60% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
What Is the Lyon's Ragwort?
Lyon's Ragwort (Senecio lyonii) belongs to the Asteraceae family within the Senecio genus.
Lyon's Ragwort displays an upright, trailing, or clumping habit growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Lyon's Ragwort produces small, daisy-like flowers in various colors.
Leaf size: approximately 3 inches.
How Often Should You Water a Lyon's Ragwort?
Senecio lyonii requires watering every 7–14 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 7–14 days
Let soil partially dry between waterings
What Light Does the Lyon's Ragwort Need?
Lyon's Ragwort thrives in bright indirect light to full sun. Avoid placing Lyon's Ragwort in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light to full sun
What Temperature and Humidity Does the Lyon's Ragwort Prefer?
Senecio lyonii grows best at temperatures of 50–80°F. Lyon's Ragwort prefers humidity levels of 40–60%.
Temperature
50–80°F
Humidity
40–60%
What Soil Mix Works Best for a Lyon's Ragwort?
Well-draining sandy soil mix with added perlite for extra drainage. Good drainage is essential for Lyon's Ragwort to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Lyon's Ragwort?
Feed Lyon's Ragwort 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 Lyon's Ragwort?
Repot every 1-2 years in 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 Lyon's Ragwort?
Lyon's Ragwort can be propagated through stem cuttings, division, seeds. Similar propagation techniques also apply to adenotrichia amplexicaulis plant care, which shares the same genus.
Is the Lyon's Ragwort Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
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 Lyon's Ragwort?
Lyon's Ragwort is susceptible to aphids, spider mites, mealybugs. 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 Lyon's Ragwort Need?
Lyon's Ragwort grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Lyon's Ragwort as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Lyon's Ragwort 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 Senecio genus — compare its care with other Senecio species on PlantoScan.
Senecio is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Lyon's Ragwort thrives in bright light and direct sun — see other bright-light plants.
More Senecio Species
Other Senecio species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Senecio lyonii A.Gray ex Lyon, family Asteraceae (first published in Bot. Gaz. 11: 335, nomen (1886)) — World Flora Online record, IPNI name record.
- Pet toxicity: Lyon's Ragwort is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. 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.
Identify Plants Like the
Lyon's Ragwort Instantly
Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.
Free
to download
iOS & Android
platforms
Light & dark
mode
100,000+
species