Canada thistle was introduced here in the 1600's from Europe. It has spread to many parts of the world. Canada thistle crowds out native and desirable plants and ruins grazing areas for livestock.
Maybe you've seen tall pink flowers with prickly-looking leaves along the roadside. If so, you know what Canada thistle looks like. It's a tall problem plant with roots that can grow 15 feet deep. Here's how to control it.
Canada Thistle is a broad-leafed weed. That means you can use a weed product such as Ortho® Weed B Gon Max® Weed Killer for Lawns with success. This product could take a while to work, since the plant's root system is so big. You may need to re-apply.
These methods don't work and may actually help the plant spread. Besides, who wants needles in the hand?
Canada thistle was introduced here in the 1600's from Europe. It has spread to many parts of the world. Canada thistle crowds out native and desirable plants and ruins grazing areas for livestock.
