Canada thistle (Cirsium arvense) was one such plant when we moved to Northeast Ohio five years ago.The blue-gray foliage of the rosette-shaped seedlings looked intriguing during spring, and in the ...

When Canada thistle infestations occur in situations where root growth would be restricted, such as habitats with high water tables, begin mowing when it is 12 to 15 inches tall. Repeat mowings at ...

Canada thistle, a terrestrial herbaceous perennial in the Asteraceae family, is an open-land invasive that prefers disturbed upland areas as well as wet areas with water fluctuations. Canada thistle ...

Canada thistle (Cirsium arvense) is a perennial that grows from seeds but can also spread by roots. Skip to content. All Sections. Subscribe Now. 59°F. Thursday, July 10th 2025 ...

Step on a Canada thistle with bare feet and you’ll know it right away. Canada thistles have a robust root system. Roots grow 6 feet or more deep and extend horizontally 15 feet or more.

Due to the wet springs we’ve had, common mullein and Canada thistle have been especially prolific the last several years. With seed-heads and flowers on the plants now, both weeds are at their ...

Canada thistle (Cirsium arvense) is probably near the top of the list for just about any gardener and farmers too for that matter. It is a tough perennial broadleaf weed America's most weeded ...

Step on a Canada thistle with bare feet and you’ll know it right away. Canada thistles have a robust root system. Roots grow 6 feet or more deep and extend horizontally 15 feet or more.