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Weeds #936607

Asked June 23, 2026, 10:45 PM EDT

I am looking for a list with pictures of invasive/noxious weeds that are in Clackamas County.

Clackamas County Oregon

Expert Response

Thank you for your question, Mark. There are several resources, and I am uncertain whether any of them include all “weeds”. Not everyone agrees, and none are exclusive to Clackamas County. Here they are:

https://www.oregon.gov/oda/weeds/oregon-noxious-weeds/pages/default.aspx

https://www.metromastergardeners.org/resources/weedres.php

https://weedwise.conservationdistrict.org/tag/noxious

https://solvepestproblems.oregonstate.edu/lawn-problems/grassy-weeds

https://depts.washington.edu/waipc/docs/gardensmartguide.pdf

Good luck!

An Ask Extension Expert Replied June 24, 2026, 2:04 PM EDT

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This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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