Class 3 · Containment
Scotch Thistle
Onopordum acanthium
Also called Cotton thistle.
Widely spread. Effort goes to new or expanding populations; established stands are managed by whatever method the weed control authority approves.
- Jun - Aug
- Treatment window
- Class 3
- Utah designation
What we know
Class 3: containment
Widely spread. Effort goes to new or expanding populations; established stands are managed by whatever method the weed control authority approves.
Treatment on scotch thistle works best jun - aug. A full profile for this species is still being written. Until it is here, the USU Extension field guide carries identification detail, and we would rather hear from you than have you guess.
At a glance
- Common name
- Scotch Thistle
- Scientific name
- Onopordum acanthium
- Utah class
- 3 - Containment
- Treatment window
- Jun - Aug
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