Everybody loves a beautiful garden. Gardeners love plants that are adaptable, tough, and fast-growing. It's even better if that plant produces showy fruits that attract birds or is an annual that self seeds, so it doesn't need to be replanted every year. Unfortunately, many of these plant traits desirable to gardeners can also increase the likelihood that a plant jumps the garden fence and invades natural areas.

Invasive plants threaten our environment and economy. They pose an enormous threat to our native plants, animals, and ecosystems, and they cost the United States approximately $35 billion per year (www.invasivespecies.gov).

People have introduced invasive species both accidentally and deliberately. This app focuses on plant species that are used ornamentally and have become invasive in at least part of the Midwest. Cultivars or hybrids produced from these species may or may not be invasive. In the few published cultivar evaluation studies, some cultivars prove to be more invasive than the parent species, others less or not invasive. We lack research about cultivar invasiveness for many of these species. When we have good evidence about a problematic or relatively benign cultivar, we list those specifically.

Suggested alternatives include both native species and non-native species that currently show no signs of becoming invasive.