Hi Kabby
I read the same things you did online about shade and Zebras not going there. Wish I knew more but I'm in Zone 6a/6b. I did read where it said that they need pollen as well as nectar to survive the long time they're capable of. I know my Passion vine here already has tons of pollen and since you're planting that anyway, it should help. Mellie and the other Southern gardeners for BFs are great! They'll come along with great advice soon I'm sure! Good Luck!
Cheryl