What can I grow in the shade???

I'm looking for something, perferably a tree, that I can grow in a container in all shade. My wife just bought 2 huge pots to put near the front door and I'd love to put something in them that will produce some edibles for us. The front of the house faces south so there's plenty of light but these pots will be under a 10 foot awning and receive no direct sunlight. I'm right on the 9b 10a line in Florida. Is there anything that will work in this situation? Thanks for any help!