It is Salvia yangii, which until recently was called Perovskia atriplicifolia. These days I find it easier to just call it by its common name, Russian Sage. (Lol, I'm reminded of a song with the line, "but my real name is Mr. Earl")
No way to confirm it is 'Blue Spire' cultivar .
Edit to add: I find the scent entirely sagelike, no lavender that I can detect. By the scent alone, it makes me wonder why the plant-naming people couldn't figure it out without needing a DNA test!
Second addition: things like this will get more views in the Plant ID forum, where you usually post. This is sort of an obscure forum. I hope some others see it and can identify the cultivar.