Who cares where the plant comes from, as long as it does well and looks nice?
The issue is that a plant such as potato vine, kudzu, water hyacinth or pampas grass, in its native habitat grows under certain constraints: soil composition and nutrients, wind, rainfall, temperature, sun or shade, humidity. Removed from those constraints, transferred to a different set of conditions, the plant may thrive beyond all expectations or desires.
Invasive non-native plants are among the greatest threats to existing ecosystems. They can wipe out native plants and destroy wildlife habitat. They can diminish the light, water, nutrients, and space available to native species, alter hydrological patterns, soil chemistry, moisture-holding capacity, and erodibility, and change fire regimes. Some may even contain toxins that may kill certain animals – garlic mustard, for example, contain compounds that are lethal to a native butterfly species.
Please visit Florida Exotic Pest Plant webite for detailed information and photos on invasive non-native plants that should be removed from your yard. http://www.fleppc.org
To learn more about natives: www.fnps.org
To Find native plants: www.anff.org