I'm fascinated by this plant, Josephine; I've never seen it. I doubt very much it would easily grow here; I don't even recognize the names of the butterflies as being common in this area.
My problem is that I want every new wildflower I see and frostweed is definitely one of the most beautiful. I've read that they will grow here in zone 7a, so I'm tempted to try it. I hate to take them from their native land, though, so maybe I should just sit back and enjoy yours from afar, same way I enjoy your bluebonnets.
Thank you!