Common buckthorn, a woody shrub/small tree in the Rhamnaceae family, is an understory invasive that produces large amounts of seeds and outcompetes many native species. Additionally, this species is ...

Common buckthorn, the most widely-found variety ... the spring or fall because it tends to leaf out earlier than other plants ...

Buckthorn is very invasive and is a noxious weed in Minnesota that takes work to eradicate. Of note, not all buckthorn plants have berries.

decided to focus its attention on common buckthorn (Rhamnus cathartica), which is an invasive shrub species in North America. It out-competes native plants and degrades soils and forests ...