These woody weeds are often left unchecked for many years because they look “natural” in a windbreak or other area of trees. ... The focus of this article is common buckthorn (Rhamnus cathartica), which poses the most significant threat to tree plantings and native woodlands in eastern South Dakota and much of the Midwest.

Is buckthorn a weed or a tree?

Description: Common buckthorn is a shrub or small tree in the buckthorn family (Rhamnaceae) that can grow to 22 feet in height with a 10-inch wide trunk. The crown shape of mature plants is spreading and irregular. The grey to brown bark is rough textured when mature and may be confused with that of plum trees.

Is buckthorn a noxious weed?

Both Common and Glossy Buckthorn have are restricted noxious weeds.