I hit the clearance table at Lowe's and bought a couple things that had been marked down to a dollar. I got two pots of gaillardia 'Mesa Yellow' and one pot of Veronica 'Atomic Lavender'. It's hard to resist. I've never grown veronica. Please say it's heat tolerant.
I've been watching for containers marked down. I'd like to find some five gallon-ish sized pots that are the light weight ones - the ones that look like concrete but they're really some kind of foam. If anyone sees some around the Springfield area, let me know.