Buckthorn (Rhamnus cathartica) is an invasive species which crowds out wildflowers in the forests of the Midwest. There are many different management techniques have been employed to control the plant, however re-invasion is a big issue. Some observation have shown that mulching can provide some resistance to r-einvasion, including using buckthorn chips - which are thought to be allopathic. In this project we propose to test various mulches to determine if there are any which are  more likely to limit or prevent re-invasion.