Noxious Weeds Blog

All things noxious weeds. Written by program specialists in King County, Washington

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Tag: knotweed

A visual of mulching layers. The top later is 4-12 inches of heavy mulch, which is defined as arborist chips or bark/coarse mulch. The second layer is a paper layer, comprised of cardboard or newspaper. The final layer is weeded soil. 1-2 inches of compost layer are also interspersed throughout.
September 22, 2023September 22, 2023 kcweeds

Weedy Fall Activities

photo collage of a green shrub in bottom right, smoking volcano in background, paper yellow sun in top right corner
July 25, 2023 kcweeds

Are weeds “weedy” in their native range?

September 29, 2020March 20, 2023 kcweeds

I dream of knotweed: the Water and Land Resources Division at work

Invasive Species & Exotic Pest Workshop March 29, 2019 in Bellingham, WA
February 13, 2019 kcweeds

Cross-border workshop on invasive species and exotic pests in Bellingham March 29

milk thistle seedlings in fall
October 10, 2018October 12, 2018 kcweeds

Control weeds in the fall to reduce work next year

June 15, 2018 kcweeds

Knotweed control classes offered June 20 and June 26

June 15, 2018 theweedsbeat

Invasive weeds that are ripe for action this time of year

cover image of the 2018 King County Noxious Weed List
February 8, 2018 kcweeds

King County Weed Board approves noxious weed list for 2018

Spotted jewelweed in Swamp Creek wetland, photo by Cynthia Saleh
September 13, 2017 kcweeds

The Noxious Weed Horrors of Swamp Creek

tansy ragwort with flowers and seeds shown with a garbage bag
September 10, 2017September 13, 2017 kcweeds

Noxious weed control tips for September

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Have you heard of sheet mulching? It's a way to suppress weeds from coming back and build back soils following weed removal.⁠
Want a career saving the planet🌎️? The Green Jobs boom is emerging.⁠
Purple loosestrife is a beautiful weed that can have major impacts on wetland environments, so landowners in king county and legally required to required to control this plant on their property. 🌿👍
Weeds and wildfires…let’s talk about it! 🌿🔥⁠

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