Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Aug 3, 2026

Description of specimen

Submitter does not have a specimen
EDRR Status: Local expert notified

Large stand that was maybe cut down at some point but came back.

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

Along the Riverside Loop Trail.

Expert Reviewer

Avatar of 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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