Eupatorium cannabinum, commonly known as Hemp-agrimony, is a herbaceous plant of the family Asteraceae. It is a robust perennial native to many areas of Europe. It is occasionally found as a garden escape in other areas such as British Columbia.
If the genus Eupatorium is defined in a restricted sense [about 42 species], Eupatorium cannabinum is the only species of that genus native to Europe [with the remainder in Asia or North America].
Eupatorium cannabinum grows 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 flowers which are pollinated by insects from July to early September. The flowers are tiny, fluffy and can be pale dusty pink or whitish.