Canada thistle (Cirsium arvense) is an aggressive, invasive plant. Here's how it spreads and how to identify it so it doesn't ...

We asked our gardening expert for advice on how to get rid of thistle plants. “My vegetable garden has been overrun with ...

Globe thistle is a fast-growing, contemporary-looking perennial plant with spherical blue, purple, or white blooms that add arresting color to summer border gardens. Yet unlike other eye-catching ...

Like many other biennial invasives, bull thistle is able to produce a large seed bank that can remain viable for up to 10 years! As a result, the plant can easily spread and form dense stands in ...