I’ve had some success with cutting-grown Missouri Evening Primroses (Oenothera missouriensis, also called Ozark Sundrops). I made some cuttings last summer and planted the new clones out this spring. These do not seem to be invasive like their Mexican cousins, so I’m liking them a lot.
Here’s an example of the annual Geraniums I planted this year. Unfortunately, most of these are getting smothered by nearby tall flowers flopping on them. That’s my curse — I always seem to plant things that are too tall! I’m going to try to be better about this as I redesign my flowerbeds this fall and next spring.