Noxious Weeds Blog

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

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Category: Other

Volunteers and crew members in field gear standing in a sunny park under a white canopy.
December 17, 2024June 16, 2025 kcweeds

How community members came together to restore a wetland in Renton

large bag of salt & jug of horticultural vinegar superimposed on a desolate desert backdrop.
June 20, 2024June 13, 2025 kcweeds

Salt & Vinegar on Weeds? Save it for the Chips!

poison hemlock clusters of white flowers
May 22, 2024March 18, 2025 kcweeds

Poison Hemlock: Know it, Dig it, Trash it

gloved hand holding dug up plant with horizontal root shooting up multiple new growths (rhizome)
February 16, 2024June 20, 2024 kcweeds

The 2024 Noxious Weed List is Official!

Knotweed infestation through seasons: lush green, to yellowing, to dead canes
December 20, 2023June 20, 2024 kcweeds

What is Plant Dormancy & Why Does it Matter?

A noxious weed specialist spraying knotweed. The knotweed is growing several feet over head.
December 6, 2023March 27, 2024 kcweeds

King County’s Knotweed Control Program: Then and Now

English ivy hanging basket in a plant nursery
October 18, 2023March 8, 2024 kcweeds

Noxious Weeds & Prohibited Plants: A Listing Guide

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, 2023December 20, 2023 kcweeds

Weedy Fall Activities

orange fire blaze on woody branching plants, 2 firefighters blurred in background
September 6, 2023December 6, 2023 kcweeds

Weeds and Wildfire 

photo collage of a green shrub in bottom right, smoking volcano in background, paper yellow sun in top right corner
July 25, 2023December 6, 2023 kcweeds

Are weeds “weedy” in their native range?

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