Noxious Weeds Blog

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

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Tag: noxious weeds

a person digging up poison hemlock
March 8, 2024December 20, 2024 kcweeds

Weedy Resources in King County

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

Text on photo: Proximos Events Se ensana en espanol. Person spraying herbicide from a backpack wearing a face covering.
November 1, 2023November 25, 2024 kcweeds

Próximos Eventos

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?

June 20, 2023September 22, 2023 kcweeds

Learn to Identify Plants

1 larger photo of yellow flower in field on left, 3 stacked photos on right of flowers: purple poofy, yellow with heart shaped petals, and white trumpet shaped
June 20, 2023June 20, 2025 kcweeds

Summer Weeds to Watch for

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