Invasive knotweed control workshops a great success

The early bird gets the worm. This summer, the Riparian Noxious Weed Team offered free workshops on knotweed control for local homeowners.


Pictured: From left, Erin Haley and Sayward Glise.

Knotweed, a noxious bamboo-like plant is growing in backyards, community gardens and most successfully along river systems of King County and throughout North America.

Two project leads that are doing work on King County Rivers are Erin Haley (Green-Duwamish) and Sayward Glise (Cedar River Team).

“We currently have knotweed control projects on the South Fork Skykomish and Tye River, the Upper Snoqualmie River, the Cedar River, and the Green-Duwamish River. In 2016 our team and its contractors treated 17 acres of knotweed and surveyed 2,100 acres,” said Sayward. “Other than control work, the Riparian Team also conducts workshops to homeowners throughout the county on how to successfully control knotweed on their property.”

“KCNWCP has been providing these free homeowner workshops since 2008,” added Sayward.

Learning how to control the spread of knotweed can greatly improve local vegetation, water quality and habitat for fish and wildlife. Also, it can prevent damage to roads, pipes, and building foundations.

“It feels good to provide a service and a resource to empower our community to stop the spread of invasive knotweed,” concluded Erin.

Click here to get more information about current knotweed control projects.