Alert:
Invasive plants are non-native species that were introduced on purpose or by accident from other regions of the world, or the country. Invasive plants can tolerate a range of habitats and grow almost anywhere. For example, Japanese Stiltgrass, Microstegium vimineum, can produce seed in as little as 1% sunlight. Invasive plants often produce huge amounts of seed or have roots that spread aggressively. They compete with native species for nutrients, sunlight and water, eventually reducing native populations.In some cases, they can even eliminate a native species from a community altogether.
Some invasive plants have more complicated effects on the food chain that lead to fewer native birds and less wildlife. Invasive plants are linked to the decline of the songbird population because scientists have found that the berries of invasive shrubs are “junk food” for birds. They are also tied to the potential extinction of other species. For example, the West Virginia white butterfly is threatened because the butterflies confuse their native host plant with invasive Garlic Mustard, and eggs laid on Garlic Mustard cannot survive.
The IMA project started in 2006 with 20 site leaders. Since then, more than 150 acres have come under IMA management, and there are now 65 sites and 75 IMA site leaders across the county. Find your closest site and make an impact!
Click Infographic and Map to enlarge
IMA's Impact Infographic
IMA Sites Map
Invasive Management Area funding is provided by the Fairfax County Board of Supervisors in support of the board’s Environmental Agenda. In 2025, the Park Authority, a core member of the National Capital - Partnership for Regional Invasive Species Management (Nat-Cap PRISM) received a grant from the Virginia Department of Forestry to support the invasive species program. The IMA program also is supported in part by the Fairfax County Park Foundation.
To learn how private and corporate donations help restore parkland habitat, please visit the Park Foundation website.
