Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on May 14, 2023

Submitter does not have a specimen
EDRR Status: Population assessed

Description of specimen

10-15 foot tall, spade shaped leaves, stems somewhat resemble bamboo.

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

Many areas of infestation in the park, near the river

Expert 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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