Bristly Thistle (Cirsium Horridulum) is a biennial herb in the Asteraceae family with easy care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 5-9. This plant is safe for cats and dogs.

Cirsium horridulum is a spiny, native thistle found across the eastern and southern United States, Mexico, Central America, and the Caribbean.

Bristly Thistle

Bristly Thistle

Cirsium Horridulum

Cirsium horridulum is a spiny, native thistle found across the eastern and southern United States, Mexico, Central America, and the Caribbean.

Quick Facts

Type
herb
Lifecycle
biennial
Care Difficulty
Easy
Water Needs
Moderate
Light
Full Sun, Partial Shade
Hardiness Zones
5-9

Safety

🐕
Pet Safe
👶
Child Safe
Non-Toxic

Growing Conditions

Soil Types:sandy, loamy
Indoor:No
Outdoor:Yes
Garden Use:specimen, pollinator support, wildlife habitat

Care Calendar

Monthly care tasks for Bristly Thistle

Jan
Prune
Feb
Fertilize
Mar
Repot
Apr
Water+
May
...
Jun
...
Jul
...
Aug
...
Sep
...
Oct
...
Nov
...
Dec
...

Expert Care Tips

Pro tips from botanists and plant experts

Watering Tip

Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.

Humidity Trick

Group plants together to create...

Growth Hack

Rotate your plant every...

Photo Gallery10+ photos

Bristly Thistle
Bristly Thistle detail

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Taxonomy

Family:Asteraceae
Genus:Cirsium