Agastache mexicana belongs to a large, widespread genus, with species native to a variety of habitats, predominately in dry hilly areas of the Southwestern U.S., Mexico, Japan, and China.

I thought I had a image of it sprawling out of the oak-half barrel, but apparently only kept this one, of a overnighting carpenter bee on a flower.
Bees and hummingbirds favor its large, nectar-rich flowers -- and, it has a long flowering time, so there's not much NOT to like about that.