Noxious Weeds Blog

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

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Tag: poison hemlock

September 22, 2026September 22, 2026 kcweeds

Prioritizing Poison Hemlock in King County

August 28, 2025September 4, 2025 kcweeds

Seedy & Weedy: A Visual Guide to Common Weed Seeds

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

Poison Hemlock: Know it, Dig it, Trash it

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

Annual bugloss (Lycopsis arvensis)
April 11, 2021March 20, 2023 kcweeds

Washington prohibits sale and distribution of twelve new plant species

April 10, 2020 martaolsonwlrd

Let’s pull together!

March 23, 2020 martaolsonwlrd

¡Ya empezó la temporada de la cicuta!

Early garlic mustard flower in March
March 17, 2020March 20, 2020 kcweeds

What’s weeding now?

March 17, 2020March 17, 2020 martaolsonwlrd

Poison-hemlock season is here

AmeriCorps members
November 18, 2019 kcweeds

Scary moment for restoration crew serves as a timely reminder about risks of poison-hemlock

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