Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Apr 24, 2026

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

Description of specimen

There are two clumps visible in a narrow pathway. It's coming up from behind a very tall fence that you cannot see through and that property is very overgrown and is probably full of it

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

It is visible in a small path between Oak Grove elementary school and Wabash Avenue. There is a large overgrown property on the other side of the fence that it is coming up from and that side is probably full of it

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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