Cirsium grahamii Plant Care
Cirsium grahamii A.Gray
Updated · Sources · How we source care data
Cirsium grahamii, called Graham's thistle, is a North American species of plants in the tribe Cardueae within the family Asteraceae. The species is native to Sonora, Chihuahua, Durango, Nuevo León, New Mexico, and Arizona.
Every 7–14 days
Full sun
60–80°F
40–70%
At a glance
How do you care for Cirsium grahamii?
Water Cirsium grahamii every 7–14 days, letting the top layer of soil dry out between waterings, and give it full sun. It prefers temperatures of 60–80°F (16–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Cirsium grahamii Native To?
What Is the Cirsium grahamii?
Cirsium grahamii (Cirsium grahamii) belongs to the Asteraceae family within the Cirsium genus. Cirsium grahamii is native to Sonora, Chihuahua, Durango, Nuevo León, New Mexico, and Arizona.
Cirsium grahamii displays a tall, spiky perennial growth habit, reaching up to 4 ft tall with a spread of approximately 2 ft. Cirsium grahamii produces showy purple or pink thistle-like flower heads.
Leaf size: approximately 12 inches.
How Often Should You Water a Cirsium grahamii?
Cirsium grahamii 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 Cirsium grahamii Need?
Cirsium grahamii thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the Cirsium grahamii Prefer?
Cirsium grahamii grows best at temperatures of 60–80°F. Cirsium grahamii prefers humidity levels of 40–70%.
Temperature
60–80°F
Humidity
40–70%
What Soil Mix Works Best for a Cirsium grahamii?
Well-draining sandy loam with added organic matter. Good drainage is essential for Cirsium grahamii to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Cirsium grahamii?
Feed Cirsium grahamii 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 Cirsium grahamii?
Divide and replant 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 Cirsium grahamii?
Cirsium grahamii can be propagated through seeds. Similar propagation techniques also apply to creeping thistle plant care, which shares the same genus.
Is the Cirsium grahamii Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Cirsium grahamii, 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 Cirsium grahamii?
Cirsium grahamii 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 Cirsium grahamii Need?
Cirsium grahamii grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Cirsium grahamii is native to Sonora, Chihuahua, Durango, Nuevo León, New Mexico, and Arizona. In cooler regions, grow Cirsium grahamii as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Cirsium grahamii 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 Cirsium genus — compare its care with other Cirsium species on PlantoScan.
Cirsium is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Cirsium grahamii thrives in bright light and direct sun — see other bright-light plants.
More Cirsium Species
Other Cirsium species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Cirsium grahamii A.Gray, family Asteraceae (first published in Smithsonian Contr. Knowl. 5(6): 102 (1853)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Cirsium grahamii, 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 13a, 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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