Kitty, I haven't tried the SuperCal Petchoa yet, but frankly, I'm waiting until the fall to get some because anything related to petunias and calabrichoa has petered out for me in our hot humid summer weather.
If it's going to survive, I think getting it established and growing it in a protected spot through the winter will give it the best chance of being 'perennial' in Florida if that is possible. A sunny southern exposure for the winter, and shade through the middle of the day in summer would be my best guess at a good location for it. If you already have some, I would think trimming them back a bit as you go through the summer, and giving them lighter fertilization through the cooler months might keep them going.
Up there in "cold" northern Florida, you might have to keep it in a big pot and give it some good protection - frost cloth or a cardboard box - on cold nights through the winter, but I'll bet it will bloom through the winter months for you if you do.
The other thing to try if it starts failing on you is starting some cuttings from the healthy parts of the plant. I've had success with some petunia relatives doing that.
