Noxious Weeds

Invasive weeds threaten the health of our natural areas. This program will help you learn to identify and remove the most damaging of these plant species.

Learn More!

  • The Clackamas/Clark/Multnomah/Washington County Cooperative Weed Management Area (4-County CWMA) is a partnership of organizations, agencies and non-profits dedicated to combating invasive weeds across the region.
  • Let King County’s Noxious Weed Information and Services teach you everything you need to know about invasive weed identification and control.
  • Learn all about invasive plants with the City of Portland’s Invasive Plants Poster
  • Get resources and learn about workshops offered in East Multnomah County.
  • Watch excellent, educational weed videos and learn about what’s being done to control weeds in West Multnomah County.
  • Watch OPB’s The Silent Invasion

Get Involved!

  • Report a weed! Thanks to the East Multnomah Soil & Water Conservation District, learn which weeds to report, and how to do it.
  • Support the No Ivy League! Since 1994, they have worked tirelessly to empower youth, educate the public, and remove English ivy from Portland’s parks.