I live in Omaha which is 5b. As my backyard steadily progresses and other projects grow close to completion, I'm looking again at flowers I had determined I wanted a few years ago and some of them don't quiiiiite hit the 5b zone. 6 is where Red Salvia and (Winter) Jasmine each hit. Flowers I had chosen to bring in bees and hummingbirds.

Is it worth a try to get flowers that prefer zones 6 and over or should I search for other flowers to attract bees and hummingbirds? (we have what we think are ground ivy/creeping charlie that do fine for bees, but they're so close to the ground, our tiny dog picks fights with them. One of these years, our lilacs should bloom as well.)