Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Sep 10, 2021

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

Description of specimen

Pointed oval leaves, bamboo-like stalk, numerous spikey white flowers.

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

Roadside and among plants at nursery on south side of Bornstedt road just east of Rude Road intersection.

Expert Reviewer

Samuel Leininger
Clackamas Soil and Water Conservation District
4-County Cooperative Weed Management Area
Columbia Gorge Cooperative Weed Management Area

© 2025 Portland State University | Contact us for questions regarding site content