Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Jul 1, 2026

Description of specimen

Submitter has sample
EDRR Status: Local expert notified

Back yard of a not maintained yard over growing for years , spreading to my yard cannot control need help from county.

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

2715 se oak grove blvd milwaukie oregon Back yard of a not maintained yard , japanese knotweed growning out of control into my yard tried everything but poison ( kids and dogs ) hope to have the county talk with home owner .

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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