From the looks of it, would be a miracle for that plant to come back and give you any tomatoes. I would hazard a guess that it is simply too hot in your zone right now. Plus it looks like you have too many plants growing in that small area, not enough sun judging by the legginess of the plants, and the soil seems to be quite heavy. I have also heard that gardeners in the warmer areas have to contend with soil nematodes, but not sure whether that's a factor.

There is a forum member who gardens in Florida and she plants a second crop of tomatoes in the Fall. Good luck.

Yes, nobody grows vegetables like Silvia can. But Donna is right. Most of us pull out tomatoes and many other vegetables starting in May, then either take the summer off or switch to hot weather veg like okra, sweet potatoes, gandules, malabar spinach and so on, and start up again with tomatoes in the fall.

The summers here are just too hard on plants, not only the heat, but the explosion of pests. And many of us stick with containers for tomatoes because of the nematode problem.

If you aren't familiar with it, the University of FL publishes an excellent guide to vegetable gardening in Fl, including suggested planting dates for each region.

Also, you might want to read around at justonebackyard.com. He's in West Palm, but his blog and videos will give you a good idea of what produces when.

Here is a link that might be useful: IFAS Planting Guide