Noxious Weeds Blog

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

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Tag: washington state

Sprig of holly showing spiny waxy leaves and bright red pea-sized berries.
February 17, 2026February 17, 2026 kcweeds

The 2026 Noxious Weed List is Official!

September 10, 2025September 9, 2025 kcweeds

Say Goodbye to Common (English) Ivy: Washington Issues Statewide Ban on Sales 

Sprig of holly showing spiny waxy leaves and bright red pea-sized berries.
March 18, 2025January 29, 2026 kcweeds

The 2025 Noxious Weed List is Official!

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!

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

Noxious Weeds & Prohibited Plants: A Listing Guide

March 20, 2023July 24, 2023 kcweeds

The 2023 King County Noxious Weed List is Official!

March 20, 2023April 28, 2026 kcweeds

Spring Cleaning – Get into the Weeds

March 20, 2023June 20, 2023 kcweeds

Springtime Weeds

December 23, 2021December 5, 2025 kcweeds

The story of Common (English) holly in Washington

Spotted lanternfly adult. Pennsylvania Department of Agriculture.
October 12, 2021March 20, 2023 kcweeds

Statewide call for tree-of-heaven locations in effort to prevent spotted lanternfly spread

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