Canada Thistle

Invasive species removal is the most difficult challenge I encounter in my gardening work, and Canada thistle (Cirsium arvense) is my biggest adversary. Most northern gardeners are familiar with this prickly aggressor, but I’ll introduce you just in case you’re not. Canada thistle is a perennial plant with spiny lobed leaves that grow in an…

Read More

Alternatives to Invasive Plants

Here’s the thing about plants that become invasive: They usually start out as a plant someone loves. Buckthorn was hailed as a great hedge plant in the mid 20th century—and it was a nice hedge, except that birds started distributing the seeds all over Minnesota’s wild areas. Now this rogue plant is threatening many native…

Read More