Martin, I don't know of any thing that can take 70 degrees one day and then take 17 degrees during the night. As I had mentioned earlier we have lost even hickory seedlings when the weather does that here. I was only reporting what happened to us with one potted Marseillese Black VS. I was only commenting on the fact that the two hour freeze killed the pomeganada, wich was no surprise. But the fact that the peach seedling which was about three feet was killed and not the fig surprised us.
I was never aware that there was part of Florida that had that type of wide swings in weather. I thought we had it rough here in our part of Connecticut trying to grow figs where it can get as low as minus 21 degrees fahrenheit and has late and early freezing.
That is why we look for fig trees that have already been tested and proven in our area. Marseillese Black VS was found in the Maryland area by Warren Turner. It was then test farther north into New Jersey by Herman. Now we are testing farther north to see if it will perform for us, as well as it did for Herman
We think it might be able to even take more cold then the minus 7 degrees it took in Maryland. But, that does not mean it would be the best for your area. Nor for our area since we to have to deal with late and early freezes. How long the freeze last plays a part in whether or not a plant will survie or die.
I think if were to have put maybe a 100 different fig cultivars out that day, some would have been killed while some would have been able to take it. I was only reporting that to our surprise Marseillese Black seems to be to a certain degree able to take some late frost or freezing weather.
Those years where it goes from 70 or 80 during the day time several times and then back into freezing after a tree has broken dormacy, I would think most trees would be either killed or set back. I don't know how Marseillese Black VS taste. But Herman seems to think it taste good grown outside without winter protection in his part of New Jersey.
Although I have never tried this before I will try to up load a picture of the fruit, so that others can see what it looks like.
Have you been able to locate any local fig trees in your part of Florida, that have been proven over the decades to be able to take your weather most of the time?