Canada Thistle

Purple thistle flowers in bloom with a blurred natural background.

Name: Canada Thistle (Cirsium arvense)
Introduction: Native to southeastern Eurasia, contaminated crop seed
Habitat: Rich, heavy loam, clay loam, and sandy loam, with an optimum soil depth of 20 inches
Infestation: Crops, pasture, rangeland, roadsides, stream banks and landscaping. It can crowd out forage
grasses by up to 60 percent. It can also invade native plant communities.
Available Control: Mechanical, chemical, biological
Priority of Control: Deplete its root reserves before rosette has a chance to over-winter.
Biological controls: For more information about the biological control of Canada Thistle, please visit WSU Extension Integrated Weed Control Project.
For More Detail: Visit the Washington Noxious Weed Control Board listing for Canada Thistle.

Website Accessibility Policy

Pend Oreille Conservation District is fully committed to providing accessible facilities, elements and channels of communication to all members of the public. As part of this commitment, Pend Oreille Conservation District has a policy of providing an accessible website compatible with the Web Content Accessibility Guidelines (WCAG 2.1) and commercial screen reading software. All features of the website are coded to allow individuals with vision and other impairments to understand and use the website to the same degree as someone without disabilities. We welcome feedback and can often resolve issues in a timely manner if they arise.

If you need any special assistance or accommodations:

Call us at (509) 447-1155

Ongoing Compliance Information

Compliance Officer

Pend Oreille Conservation District has designated a compliance officer for website disability-related accommodations. The compliance officer has received training in website accessibility and updates the site in accordance with those best practices. Contact our accessibility officer to report an issue.

Compliance Procedures and Reports

In addition to testing with users with a wide range of disabilities and coding our website to WCAG standards, Pend Oreille Conservation District regularly scans its website to ensure ongoing compliance, and makes timely changes to any inaccessible changes, if any are found.

Linked Documents and Third Parties

Please note that this site may link out to third-party websites, such as state or federal agencies, that do not have accessible content. This site may also include documents provided by third parties included in our agenda packets, for example. While we cannot control the accessibility of content provided by third parties, we are happy to assist any member of the public with reading and accessing content on our site.

See an opportunity for us to improve? Please contact our accessibility officer or call us at (509) 447-1155.

Report a Website Accessibility Issue

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