Tree-of-heaven arrived in Pennsylvania as an ornamental in 1784; now it grows from Maine to southern California and spreads through disturbed forests
The tree-of-heaven has a lovely name and a rough reputation. According to a U.S. Forest Service species review, it first arrived in Pennsylvania in 1784 as an ornamental plant. Today it grows in places from Maine to southern California, and has infested hundreds of acres of oak-hickory forest in Shenandoah National Park in Virginia. So … Read more