Tree-of-heaven (Ailanthus altissima (Mill.) Swingle) is a native of central Asia, which was introduced to the U.S. in the 1780’s as an ornamental plant. Since that time it has become an invasive pest in our forests.
Tree-of-heaven impacts our native forests by forming dense thickets and replacing many of our native plants. The dense thickets cast heavy shade that prevents native plants from becoming established and [...]