Add stature to the back of a border with Joe Pye Weed—its notable size can't be missed! Large clustered flower heads provide a late season nectar source for beneficial pollinators. Eupatorium also has a diminuitive cousin in Hardy Ageratum / Mist Flower. This compact perennial wildflower is indigenous to moist open woods and banks of rivers or creeks. Misty clusters of frilly flowers. Shop our selection of Eupatorium plants below.