Japanese Knotweed

The Truth About Japanese Knotweed in Seattle

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Japanese knotweed can be extremely difficult to control. Established infestations may require a multi-year management plan, and herbicide treatment is commonly considered as part of long-term control.

Once you see it, you can’t unsee it. That’s true of a lot of invasive plants. You start recognizing blackberry, ivy, and bamboo everywhere. Then one day you learn what Japanese knotweed looks like, and suddenly you notice it along roads, near waterways, and in people’s yards. I see knotweed on properties around Seattle fairly … Read more