Sullivant's, also called prairie milkweed, is very similar to common milkweed but not as aggressive. Its large fragrant pink umbels flower in June and July. The plant reaches 1.5 m, 3 feet. It will hybridize with common milkweed.
 
Growing Conditions:
Sullivant's milkweed requires full sun and can tolerate medium to dry conditions.  Its long taproot makes it drought-tolerant once it is established.
 
Ecology:
Host plant for the monarch butterfly.
Very attractive nectar plant for many bees and butterflies.