Norway maple is found in 13 states in the eastern United States, from Maine to Virginia and west to Wisconsin. It is recognized as an invasive plant in many of these states. Norway maple has escaped cultivation and invades forests, fields, and other natural habitats. It forms monotypic stands that create dense shade and crowd out native plants. This plant is regulated in New York: it is legal to purchase and transport, but illegal to allow it to escape into a free-living state.