VAIL, Colorado – If there was a poster child for noxious weeds, thistles could do the job. They are easily noticed with big, pink flowers and sharp spines. They form dense colonies and can be found ...

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This weed may invade your land. Be ready to oppose it. The Enemy: Bull thistle (Cirsium vulgare) Strategy: This nonnoxious, biannual, invasive weed can be found throughout Idaho. It has hairy, deeply ...

For the past few years, I’ve participated in “Thistle Thursdays,” targeting a popular trail near Jackson, Wyoming. The weekly weed party was organized in 2019 by Morgan Graham, wildlife habitat ...

BOZEMAN – This article highlights the evolution of glyphosate (Roundup, RT3, and other generics)-resistant Russian thistle in Montana. Russian thistle ( Salsola tragus L.), a native of southeastern ...

With weed season on its way in Pitkin County, officials are warning that failing to keep yards free of certain pests could draw penalties and fines.One of this county’s most notorious weeds – the ...

Strategy: Also known as meadow thistle or leafy thistle, this is a native perennial thistle to our region. It usually shows up in meadows and pastures at higher elevations where there is a shallow ...

Plumeless thistle (Carduus acanthoides) is a winter annual or biennial that forms dense monocultures outcompeting other plants for light, nutrients and moisture. Listed as a noxious weed in Idaho, ...

Canada thistle is an invasive plant with a deep, extensive root system that requires persistence to completely remove from your lawn. Weeding out young thistles by hand and applying herbicides at the ...

close-up of canada thistle in dirt - butterfly's dream/Shutterstock If you've ever gone on a hike and seen a familiar green, spiky-looking plant, you've probably spotted Canada thistle (Cirsium ...