Submitter does not have a specimen EDRR Status: Local expert notified
Flat leaf base knotweed
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.
Along Dixon Creek by the bridge at Porter Park.
Michael Ahr Benton Soil and Water Conservation District
© 2025 Portland State University | Contact us for questions regarding site content