Scotch thistle (Onopordum acanthium) is a biennial native to Eurasia. It was introduced into the U.S. as an ornamental and as a contaminate in feed. It invades rangeland, pastures, cultivated fields ...

This has been a phenomenal year for germination of noxious weeds. Scotch thistle, for instance. Scotch thistle grows up to 13 feet tall. Cutting the root 2 inches below ground will kill that root and ...

They are an invasive, nasty plant and many people in the North Okanagan are giving up their spare time to try and control the ...

This-le, noun, widely distributed herbaceous plant of the daisy family, typically has prickly stems and leaves and rounded heads of purple flowers. There are more than 62 varieties of native thistles ...

'Here, this-tle catch your eye' - a Larkhall pensioner has grown not one, but two, 12ft Scotch thistles in her front garden. May Mackie, who previously appeared in the Hamilton Advertiser for growing ...

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 ...

In 1998, musk thistle was put on the noxious weed list for all counties in Oklahoma. The law states, “It shall be the duty of every landowner in each county to treat, control or eradicate all Canada, ...

They are topping the meadow the other side of our boundary hedge. The tractor is cutting the thistles with regular sweeps, slowly accruing the field. This, as surely as any calendar, is one of the ...

The issue: Scotch thistle (Onopordum acanthium L.), is a non-native plant from Eurasia. This biennial, which can reach 12 feet, forms a rosette with large leaves and a deep taproot the first season.