Cinderella Butterfly Bush Milkweed - Asclepias

A virtually hassle-free perennial, offering three months of vanilla scented, rose pink flowers in large, compact clusters from midsummer to early fall. Deadheading the flowers will stimulate another bloom cycle about a month after the first one. The flowers, which are heavily laden with nectar and pollen, are particularly attractive to hummingbirds, butterflies, bees, and other beneficial insects.

For best growth plant in well-drained sandy soil. 

Photos and data courtesy of Van Noort Bulb - http://www.vannoortbulb.com