I'm trying to grow Buttonbush from seed right now; put seed out just this past fall. Need a "fingers crossed" emoticon.
Kchd, I snatched up your Pycnanthemum incanum! You are right about Pycnanthemums being very attractive to all kinds of pollinators. Actually, I used to have P. incanum at one time but it disappeared after several years of drought. I'm looking forward to growing it again!