Zone: 4 to 8
Soil: sand to clay
Light: Full sun to part sun
Bloom colour: Pink or white
Bloom period: August
Height: 3 to 10 feet
Moisture:Usually medium to moist
Attracts: A variety of bees and butterflies.
Notes:This is a fairly large genus, but usually, only a few species are available in nurseries, the most common being Spotted Joe-Pye Weed. The Joe-Pye weeds have been separated from the Bonesets into the genus Eupatoriadelphus, but you will still see them commonly referred to as Eupatorium.
These plants are only in flower for a few weeks, during which time, they become quite popular with a lot of insects. They are especially popular with bumblebees, green metallic sweat bees and skipper butterflies. In full sun, plant Eupatorium maculatum which has flatter flowerheads than Eupatorium purpureum and often has leaves in pairs. The latter species is more shade tolerant and resents full sun. It is typical of its genus in having whorled leaves.
The individual flowers are not very attractive, but a mass of pink flowerheads of this plant can be eye-catching. Plant several specimens a few feet apart from each other. Most species are tall and should be planted at the back of the border. Be prepared to stake the plants in part-shade to prevent them from bending over during heavy rain.
Eupatorium dubium is on the small side, but still grows to four feet tall. It is found in the Eastern coastal states and provinces. Eupatorium maculatum and purpureum are both native to Ontario.