Plant City, FL: Sam Allen Market open everyday, vendors leave at about noon-1pm. Bulk produce for sale, I haven't found any organic fruits there tho. It's great for me since I'm in Lakeland nearby, but for vacation I would only come if you're close. The best deal I got there was $10 for 60 lbs of tangerines. They don't have a ton of exotic stuff, but they have persimmons.
Fruit N Spice park in Homestead is also really neat. Tons of weird exotic fruits. Anything that falls off the tree you can eat, also they have samples.