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Scotch Thistle

Matthew Schuster and, Timothy Prather (September, 2003)

Summary

Scotch thistle was introduced to the United States in the 1800s as an ornamental plant from the Mediterranean region. It is a noxious weed in Idaho, Oregon, and Washington. Scotch thistle can form dense, virtually impenetrable stands in low- to high-fertility soils. This publication provides information for identification, management, and control.