Leigh Tate wrote:To Mike and Tereza's point about rain, we have been getting a lot of rain, especially this spring.
It's very unusual for an established fig tree to die like that in our climate (I'm also in the South, just a half zone warmer). I suppose excessively wet soil could be doing it. Is that area also fairly shady? Figs don't take well to shade, so wet shade might be enough to do them in in wet years.
I know root knot nematodes can kill figs as well, but I would be surprised if you've got them bad if you're in 7b, especially if you have heavy soil.
If it is too much rain causing wet soil, then it might be worth trying a variety with Ficus palmata heritage in it. Both Alma and Cherry Cordial would fit the bill. The palmata genetics seems to make them more moisture-loving than straight F. carica. And while I only have experience with Alma, I can vouch for its exceptional rain resistance when ripening fruit.
Here's an Alma after several weeks of almost daily rain. That's not water dripping, that's syrup! Even with all the rain, the figs were unspoiled and very sweet.
So yeah, if the issue is excessive moisture, you might could try Alma or Cherry Cordial. It's no guarantee, but I think you'd have better odds. And of course, give them as much light as you can and trim any trees that might be shading them.