Eupatorium cannabinum, commonly known as hemp-agrimony, or holy rope, is a herbaceous plant of the daisy family. It is a robust perennial native to many areas of Europe. It is cultivated as an ornamental and occasionally found as a garden escape.
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.
An easily grown plant, it succeeds in an ordinary garden soil. It prefers a rich moist soil. Also, it grows well in marshy soils.
Mulch in spring and autumn and apply a balanced fertilizer to the soil around the plant annually in early spring.
