Japanese Knotweed (Fallopia japonica) on Oct 21, 2025
Submitter does not have a specimen
EDRR Status: Local expert notified
Description of specimen
There was one plant growing along the highway right of way.
Japanese Knotweed along with its relatives, Himalayan, Giant and Bohemian Knotweed are extremely invasive. The efforts made by our local SWCD are not enough without the help of landowners, volunteers, and local citizens to manage such a noxious weed. Like Scotch Broom, English Ivy, and Himalayan Blackberry, Knotweed has become widespread and needs you and many others to help control further spreading.
You can visit TCSWCD website to find best management practices to help manage Knotweed and other noxious weeds: https://tillamookcountyswcd.org
Michael Blankenship, TCSWCD
Michael Blankenship
Oct. 22, 2025, 11:40 a.m.