
Arizona Thistle
Also known as
Carduus arizonicus, Carduus bipinnatus, Carduus calcareus, Carduus diffusus, Carduus nidulus, Carduus pulchellus, Carduus rothrockii, Carduus truncatus, Cirsium arizonicum nidulum, Cirsium bipinnatum, Cirsium calcareum, Cirsium calcareum calcareum, Cirsium calcareum pulchellum, Cirsium chuskaense, Cirsium diffusum, Cirsium effusum, Cirsium navajoense, Cirsium nidulum, Cirsium pulchellum, Cirsium pulchellum bipinnatum, Cirsium pulchellum diffusum, Cirsium pulchellum glabrescens, Cirsium pulchellum pulchellum, Cirsium rothrockii, Cnicus bipinnatus, Cnicus calcareus, Cnicus diffusus, Cnicus effusus, Cnicus nidulus, Cnicus rothrockii diffusus and Cnicus rothrockii rothrockii
Taxonomy
Cirsium arizonicum
Cirsium
Asteraceae
Asterales

How to care for Arizona Thistle

How often to water your Arizona Thistle

every 9
Arizona Thistle needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.
Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Water 0.5 cups every
9

Check the growing potential in your area
A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for Arizona Thistle in your home

a window
Arizona Thistle love being close to bright, sunny windows 😎.
Place it less than 1ft from a south-facing window to maximize the potential for growth.
Arizona Thistle does not tolerate low-light 🚫.
Select your region to see how the current weather in your area affects the placement of Arizona Thistle in your home 🏡.

How to fertilize Arizona Thistle

Most potting soils come with ample nutrients which plants use to produce new growth.
By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your Arizona Thistle after it doubles in size or once a year—whichever comes first.

Arizona Thistle prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Sunlight Needs
Arizona Thistle requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.
Toxicity
Greg does not have confirmed data on this plant’s toxicity. If you, a family member, or a pet consumes plant material of unknown toxicity, it’s always best to consult a medical professional.
If you or someone else ingested this plant, call Poison Control at US (800) 222-1222. If a pet consumed this plant, contact your veterinarian or the ASPCA at US (888) 426-4435.
Soil
Arizona Thistle does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!
Fertilizer
Arizona Thistle is a fast growing plant and may deplete the nutrients in its soil over time. Replenish them with a gentle organic fertilizer or compost every 1-2 months depending on your location and season. Fertilize more often during the growing season and in warmer and brighter climates.
Care Summary for Arizona Thistle
Arizona Thistle
Greg recommends:

0.5 cups every 9 days

< 1ft from a window

Repot after 2x growth
Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.
