Leafy Spurge (Euphorbia esula) is native to Europe and Asia and has become an invasive species in North America. It is considered a problem due to its aggressive growth, rapid spread, and the ability to form dense colonies, displacing native vegetation and disrupting ecosystems. Management strategies for Leafy Spurge typically involve a combination of preventive measures, early detection, and control methods, which may include biological controls, manual removal, mowing, and targeted herbicide application. For specific guidance, please refer to the information on the USDA Forest Service website.