Cindi, I bought mine at a local nursery. One member bought one at Home Depot but that was in New Jersey.
Meredith, You obviously feel very strongly about the environment so you might think of doing an article about that very issue. ATP loves articles and it would certainly be an interesting read. I don't believe this would ever replace Rubeckias or echies just simply another choice, or like you said if you find them invasive. I have tried over the years to grow a perennial Rebeckia but have not succeed so I'm happy to give this plant a try. Like other new plants I have tried over the years some are fabulous and soon become favorites while others don't thrive or perform well. This is a new plant so it will be interesting to see how it does in our wet winters. Only time will tell if this will be a winner.