Joe Pye Weed
Glenn Nice, Weed Science Professional, Botany and Plant Pathology, Purdue University
In my travels around the state of Indiana I have been seeing a lot of Joe Pye weed in the ditches. Joe pye weed is a native perennial Aster belonging to a group of plants known as the bonesets (also called throroughworts). The USDA lists three species given the name joe pye weed. Coastal plain joe pye weed (Eupatoriadelphus dubius, also known as Eastern Joe pye weed), spotted joe pye weed (Eupatoriadelphus maculatus), and sweetscented joe pye weed (Eupatorium purpureum). Sweetscented joe pye weed can be found throughout Indiana in gardens, ditches and waste areas.
Joe pye weeds are tall (3 to 10 ft tall) stout plants that have whorled leaves. Leaves are entire and often have unique margins. Flowers are purple to pink. In the case of sweetscented joe pye weed, flowers are mostly pale pink in branching clusters that can be cylindrical in shape. Spotted Joe pye weed has a cluster of flowers that is flat in orientation.
To avoid this problem, make sure that you plant species that are adapted to your soil (and other) conditions.