One of the most important arguments for using native plants is that the alternative – using exotic species – runs the considerable risk of introducing taxa that become invasive and displace native species, by virtue of the exotics having left their pathogens, predators, and other natural enemies behind. There is strong evidence for this hypothesis from a number of studies.
Sincerely yours, Thomas J. Givnish Henry Allan Gleason Professor of Botany University of Wisconsin-Madison
