I had no idea it would bloom when I took a sprig of it from a friend's garden about 3 years ago! First time I've seen it in bloom. Been IDed by Asheville Plant People's FB page: Lamium glaeobdolon, and it can be invasive, but I haven't found it to spread all that fast. I'll watch it! http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=d710 (Got the original sprig from a friend's garden about 3 years ago.)