Most invasive species are so widespread that they are present across the state, and local municipalities/counties do not have the resources to remove them. Empress Tree (Paulownia), for example, is present in every county in Maryland.

Invasive plant removal requires not only the available labor to take down (or have a certified pesticide applicator treat them with herbicide one or more times), but follow-up monitoring of the site so new invasive plants don't simply take their place in an endless cycle, which is usually what happens since they have an advantage in disturbed and degraded habitat. That follow-up process requires regular site visits, the removal of any regrowing invasive plants and/or the planting of native plants, all of which requires funding and a labor pool that governments often don't have given the amount of land involved that contains invasive annuals, perennials, shrubs, vines, and trees. Some areas get help for invasive plant removal on public lands (like in parks) from volunteer groups like Weed Warriors, but those participants cannot use herbicide and likely cannot handle large, established woody material like trees for logistical reasons.

Miri