Where are you located? I just picked up a half dozen agastaches at Soares' Flower Garden Nursery in Falmouth, on the Cape; or maybe it was at Brick Kiln Farm (also in Falmouth).

stonegate gardens in lincoln.
maybe allen haskell in new bedford.
maybe newbury perennial gardens in newbury.
mindy

Of course, at some nurseries if you ask for 'aga stash' you'll get a blank stare, even if there's a pile of 'aga stacky' right there. I know because it happened to me. a few years ago. I came right home and checked the pronunciation guide, and was surprised that they were right.

It didn't make me any less annoyed with them, though.

I don't tend to noticed agastache offered in nurseries til a little later in the season...but I'm pretty sure that Bigelows in Northboro carried A.rupestris last year...

i got the gold leaved blue one (i know, NOT what you asked for) today at Pemberton Market in Camb.
mindy