Species Profile- Canada Thistle (Cirsium arvense), National Invasive Species Information Center, United States National Agricultural Library. Lists general information and resources for Canada …

Canada thistle (Cirsium arvense), is a spreading perennial weed of crops, pastures, and disturbed sites. It is most troublesome in perennial crops, rangeland, and areas where reduced tillage is …

Canada thistle is a cool season perennial which spreads by seed and vegetatively by creeping roots. In Indiana, Canada thistle normally initiates growth in spring, reaches the flower-bud …

This document provides a comprehensive overview of Canada thistle (Cirsium arvense), including its identification, distribution, life cycle, and various management methods.

Canada thistle is native to southeast Europe and Asia and was likely introduced to North America in the 1600s via agricultural seed. This plant is called Canada thistle because its introduction …

Species Profile: Canada Thistle. Crowds out native species (Stachion and Zimdahl 1980); reduces crop and forage yields (Moore 1975)

Canada thistle grows up to 5 feet tall, has leaves with sharp spines and flower heads made up of many small purple/pink flowers. Leaves are alternate (come off the stem one at time at each …

Please refer to the PNW Weed Management Handbook for information on non-selective and/or non-cropland control of Canada thistle or selective control of Canada thistle in crops or contact …

Sep 15, 2025 · Canada thistle is an aggressive, spreading weed. The aboveground portions of the plants die back in the winter, but resprout from perennial roots in the spring.

Aug 3, 2023 · Canada thistle is an aggressive broadleaf weed species of low-maintenance lawns, infrequently mowed grass rough on golf courses, as well as meadows on institutional grounds …