Mexican hyssop
I'm quite fond of hyssops ( Agastache spp). Southwestern U.S. and Mexican natives, they include all sorts of delightful plants that are well-suited to our often droughty summers. Hummingbirds like to visit their flowers, and they're drought-tolerant, which first got me interested in them , but their variety of forms and flower shapes is equally entrancing. I planted Mexican hyssop ( Agastache mexicana ) in an oak half-barrel near the porch early in the summer. The hummingbirds have been enjoying it.