Rita,
A heads-up on those "Indigo Spires" from Bluestone. A hummingbird gardener on another site just posted that she ordered 'Indigo Spires' from them and they sent some type of old world, perennial sage. She contacted them and showed them a picture of the correct plant and they said they would re-ship the correct plant. Well when she received the replacement, it was also some type of old world, perennial sage.
Sorry for the possibly bad news, but I thought you'd want to know.