I always wanted to grow some in my yard, but I think in Florida our planting season would be different than most sunflower states. This year, I need to plan ahead and try to buy some seeds in February and give them a try.
There are plenty of sunflowers in the mountains. In fact, the one in my reference photo was from western North Carolina smack in the middle of the Smoky Mountains. Next time I go up there, I will do some sunflower research!