The Thunbergia battiscombei isn't a hummingbird plant but it's really pretty!
The UGA Trial Gardens is not quite 2 hours away so it's a bit of a trip. (Luckily, I don't usually have to drive.) Athens has a Plantapalooza that day with the UGA Hort Club and State Botanical Gardens also having sales and local nurseries giving discounts if you visit the garden sales so you can make a day-trip out of it.
Have you ordered from Accents/Pepper's before?
Morris also has some sort of purple Stachytarpheta in addition to the pink.