Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Apr 23, 2026

Submitter has sample
EDRR Status: Local expert notified

Description of specimen

A collection of Japanese knot weed growing on a hill adjacent to a yard.

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

Japanese knotweed growing on hill between river road and yard. Landmarks: 34 bus stop and 4 mailboxes.

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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