Land Plants - invasive

Knotweed (species unknown) (Fallopia spp.) on Mar 5, 2025

Submitter has sample
EDRR Status: Local expert notified

Description of specimen

Knotweed, blackberry and holly proliferating along deep creek as well as invading into the woods
Initiated communications with Eric Butler clackamas County River basin Council and Shade Our Stream’s.
We have an ongoing management of our property as well as the need for more help.

Commentary

None

Remedy

Oregon State University's Solve Pest Problems page has some great information about how to get rid of knotweeds Solve Pest Problems

This is a tricky weed to manage. Consider reaching out to your local Soil & Water Conservation District for technical advice.

Location

Deep Creek Land Owners with invasive species to include: Holly, knotweed and Rubus armeniacus (blackberry)
We have been members of Clackamas watershed River basin Shade Our Stream projects prior to Covid and are looking to rejoin and stay connected as we continue to manage our nearly 20 acres along deep creek. Please advise and continue much needed programs.
Grateful always,
Jim and Karla Koenig

Expert Reviewer

Samuel Leininger
Clackamas Soil and Water Conservation District
4-County Cooperative Weed Management Area
Columbia Gorge Cooperative Weed Management Area

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