I also live in South Florida, so I feel your "pain", I am in Miramar (10b). I have a Carambola (aka star fruit) tree growing close to the east side of my home. It gets about 4-5 hours of sun in the summer and about 2-3 hours in the winter. The rest of the day it is in full shade because my two story home's shade completely overtakes it. I can tell you it does GREAT! I get more star fruit then I know what to do with! I end up feeding much of it to my chickens because I have too much! It fruits about three times a year for me. I don't fertilize it (or spray of course) and I have never had any bug or disease issues. In fact, of the 12 fruit trees I grow, it is the easiest and most prolific. If you have never tasted a Carambola fruit, you should try it before you plant it. No sense in growing something you will not eat. Unless of course you plan to feed it to chickens or the like. I like it but my wife doesn't. It is citrus-y in flavor and when you cut it crossways it forms a pretty star pattern. Another fruit you could try of course are bananas. I have three types. Two are in mostly sunny spots and one in part shade. All three fruit for me, although the shady one not quite as much as other two, but it still gives me 2-3 bunches a year. Keep in mind however that you will have to feed them. I use chicken manure. If you don't want to fertilize, bananas are tough. You can also try Jaboticaba. This tree produces grape like fruits which grow directly on the trunk and branches. It is very unusual! But if you try it, be sure to get a grafted variety or it can take 15-20 years to fruit from seed! Richard Lyons Nursery had a good selection when I bought mine a few years ago. However, it does need frequent irrigation to fruit well. As far as pineapple guava, I also grow it. It does well as a pretty tree. However I would not recommend it for South Florida because, although it is pretty, you will NEVER get a fruit you can eat due to fruit flies. They are UNSTOPPABLE! I have tried everything imaginable (except spraying), even physically covering the fruit when small with paper bags and tying it tightly. Nevertheless, every fruit gets maggots in them. It ends up making a big mess when it fruits because you can't eat the fruit and they end up rotting on the ground. Of all the fruit trees I have planted, this is the only one I regret. As for veggies, try Seminole Pumpkin. It does well in semi shade. The Seminoles used to plant them under trees in the everglades and let them vine up the tree. It was a major staple in their diet. In fact, it is rumored the Seminole War began when soldiers began shooting the pumpkins for target practice. Let me know if you would like any more info on any of these and I'll share my experiences with you. Good luck.