The Yakima County Noxious Weed Board has been helping landowners control problem and noxious weeds since 1975. Contact them ...

Identifying features include: Like other thistles, bull thistle is armed with a great number of spines that can and will penetrate exposed skin. For more information visit the Midwest Invasive Species ...

When it comes to invasive weeds that can be difficult to remove, a few thistle species rise to the top of the list. According ...

“But some thistles, like Canada thistle, are perennials that spread through underground lateral roots as well as seed.” First, determine what species it is so you know how it spreads. For seed ...

Scotch thistle is the most common thistle species in New Zealand with spines on both the leaf surface and margins. Scotch thistle is a biennial weed, so it depends quite heavily on the establishment ...

Nodding thistle is one of the most competitive thistle species causing problems in New Zealand pastures. It is known as musk thistle in some countries overseas. The species gets the name "nodding ...

For more information visit Midwest Invasive Species Information Network (MISIN). European marsh thistle can colonize areas quite aggressively and can be difficult to remove from areas due to the wet ...