Eupatorium purpureum - A North American native herbaceous perennial herb. Pink purple vanilla scented flowers in summer and autumn, which attract butterflies to the garden. A tall plant, 1.5-2 metres height by 1 metre wide, suitable for the back of the garden or as a beautiful feature plant. Full sun to part shade. A medicinal plant, being long used by Native American people. Joe Pye Weed prefers a moist, rich, well drained soil. Clump forming growth habit.