Eupatorium cannabinum is a perennial herb up to 1.5 meters (4.9 feet) tall or more and 1.2 meters (3.9 feet) wide. It lives in moist low-lying areas in temperate Eurasia. It is dioecious, with racemes of mauve flower heads which are pollinated by insects from July to early September. The flowers are visited by many types of insects, and can be characterized by a generalized pollination syndrome. The flower heads are tiny, fluffy and can be pale dusty pink or whitish. It is extremely attractive to butterflies, much like buddleia.