Most folks grow the Passiflora plant for the beauty of the vines/flowers.
Please, which variety would be happy to grow in Savannah, Georgia, zone 8b, and make decent edible fruit?

I'm surprised that you don't have these growing naturally.
Try passiflora incarnata.
I've eaten passion fruit... But I wouldn't exactly call them 'edible'.

Maybe somewhere in Savannah there are Passiflora growing naturally all by themselves but not in the mobile home park where I reside.
Thanks for the suggestion. Not everyone has the same taste in foods, so no problem there.
Hopefully someone who likes the taste of Passion Fruit may chime in with additional suggestions.

Maypop (Passiflora incarnata) is native to many parts of the U.S., including Georgia. It will be knocked down by winter freezes but re-sprouts in spring. I've never tasted the fruit but I've heard that it has a sort of sweet taste.

http://uswildflowers.com/detai...
http://www.wildflower.org/plan...
http://edibleplantproject.org/...
http://pick4.pick.uga.edu/nh/t...

There are many species that grow down South. Incarnata is one of the few can reliably grow in my zone. I ate some of the fruit 30 years ago, but have forgotten what it tasted like. Planted some again this year and will eat them next fall. Hopefully.

I grow the P. incarnata, but I've not tasted any fruit. The birds and squirrels seem to always beat me to it!

But greene has a dog, so she probably will get fruit. I have a P. incarnata "Purple Possum" on my back fence that bears the nice, purple fruit that you see in the stores for $3 apiece. My neighbor over the fence gets all the fruit because he has a dog so the squirrels don't go into his yard. On my side, all I find are the shells. But thankfully, he is a good friend and shares the harvest on his side with me.

I let him use my centrifugal juicer to spin the fruit pulp to get rid of the seeds, then we both freeze the juice and add it to other juices like lemonade, and it is delicious in recipes. On it's own the juice is very strong, but some people like it.

Mine has not died back in winter at all, but we haven't had any severe cold for at least 5 years. It galloped off along the fence for over 50ft. and looked beautiful. Has the small-ish white flowers with purple corona, really pretty. I know I have pictures somewhere of both fruit and flowers but will have to find them later. Got company coming this evening for a 4-day stay.