Non-native invasive plants were introduced to this area from other parts of the world. Here they are free of the pests and diseases that kept them in check in their native habitats. Once established, Invasive, non-native plants thrive and spread rapidly, especially in disturbed areas. They grow taller, faster, wider, leaf out earlier, and stay green later, giving them an advantage over our native species. They crowd out native vegetation and disrupt ecosystem functions with devastating effects on native plants and animals.
Here is a link to CT Invasive Plant Working Group (CIPWG) website which provides more information about invasive species and actions that can be taken to reduce/prevent their spread.