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WeedWise Program A conservation program of the Clackamas County SWCD

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Photo Credit: Lindsey Karr

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Think twice before killing those thistles: Thistle Identification March 21, 2017
Staff Spotlight: Sarah Hamilton, WeedWise Specialist & CWMA Coordinator April 6, 2017
Himalayan Blackberry BMP Now Available January 8, 2015
Welcome to our newest WeedWise Specialist! December 23, 2016
Blessed Milkthistle invading pasture lands. June 3, 2016

Recently discovered organic herbicide shown to be safe and effective against nearly all invasive weeds! April 1, 2025
April’s Weed of the Month: Garlic Mustard April 1, 2025
March’s Weed of the Month: Canada thistle March 3, 2025
Its National Invasive Species Awareness Week! February 24, 2025
February’s Weed of the Month: Scotch Broom February 1, 2025

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20 Questions Alliaria petiolata Best Management Practices BMP Christmas cinnabar moth Cirsium arvense Class A Class B Columbia Gorge CWMA CRISP Cytisus scoparius English holly English ivy Fallopia japonica Fallopia sachalinensis Fallopia ×bohemica forest understory Garlic mustard Hedera canariensis Hedera helix Hedera hibernica invasive IPM Irish ivy noxious Orange hawkweed Polygonum cuspidatum Polygonum sachalinensis Polygonum x bohemicum priority Puncturevine Ragwort resources Scotch broom slider Specialist staff Staff Spotlight Tansy thistle Weed-of-the-Month weed profile Weeds weedwise

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