Do a search on this forum on cipollini, there were some threads on these onions grown south of the Mason-Dixon line in the past with various results. I've grown them here and loved them, but I'm 1000 miles north of you so won't be much help.

Mark

Here's from Dixondale Farms:

Borettana Cippolini

This yellow onion is often referred to as a summer "mini" onion. It is very flat (1") which makes it nice for braiding or keeping in a small basket in the kitchen. Plant them as close as 2" apart to make cute, flat onions great for shish-ka-bobs or 4" apart for onions that will fill up your saucer or hamburger. This is a long-day variety that may produce too large of necks in short day areas. Makes a great specialty item when harvested and marketed with tops still attached. Will store for up to 5 months. Open pollinated, stores approximately five months, matures 110 days, very flat, yellow.