Duranta erecta 'Geisha Girl' or similar cv.

Renee, Cat's Whiskers have two blossom colors, white and light purple. The white blossomed one is my absolute favorite flowering plant. Sometimes one can get lucky here in my Zone 8b and get one to winter over in a very protected spot. I have never been able to. However, it easily roots in water in about a week. So, as cold weather approaches I root up a bunch of cuttings, pot them and grow them on by a bright window until spring. Very easy to grow but are heavy feeders. To overwinter your present plant, surround it with chicken wire and wrap burlap or muslin or landscape fabric around the wire and then pile oak leaves inside the frame. It might work. Hope so. Have you noticed that humming birds love Cat's Whiskers?

Can you add a photo of the whole plant so we can see the growth pattern? With what is shown, I will suggest blackberry.

Some other plants you might consider: baptisia australis (there are many newer cultivars in more color ranges than blue), salvia 'Caradonna'- does not flop, not attractive to earwigs, if cut back after initial bloom will re-bloom in late summer, sedum Autumn Charm-nice variegated foliage, compact grower, iris pallida either white or yellow variegated foliage - great foliage all summer long and does not need dividing as frequently as bearded iris, tanecetum vulgare 'Ilsa Gold' - fabulous bright yellow foliage all summer (I cut the small yellow, button flowers off to keep foliage from deteriorating), achillea 'Moonshine long blooming, great sliver-green foliage.