Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Jun 29, 2026

Description of specimen

Submitter has sample
EDRR Status: Local expert notified

Neighbor hood yard over grown not taking care of it spreading.

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

Overgrown back yard in neighborhood spreading into my yard cannot stop the growth without getting neighborhood to kill off the main plants.

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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