If you are in the Miami area, you would shoot yourself if you don't visit Fairfield Tropical Botanical Gardens...
Fairchild Tropical Botanic Garden
Daytona has a flea market near the raceway that has a nursery there called "Butcher's Nursery". Have some awesome plants there, but don't recall if they had bananas or not...
Daytona Flea & Farmers Market
Nursery
Have a BLAST!!!