![By Leslie J. Mehrhoff, University of Connecticut, Bugwood.org [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons](https://i0.wp.com/clctreeservices.com/wp-content/uploads/2016/06/Rhamnus_cathartica_5456085.jpg?resize=300%2C100&ssl=1)
Ontario is home to thousands of trees, shrubs and other plants; many of them native species. Sadly, many non-native species have also been introduced, some of which naturalize and others which become problematic. Those problematic plants are considered invasive species and their presence is taken very seriously. They often overtake native species and threaten their… Read more »