Sample your soil first and that will give you the keys to the kingdom. I use what LickCreek said and it works around I10 just as well as it works farther South. Rye/wheat/oats/chicory/clover in fall. If you get good rains in spring and get the clover to establish, it can persist until August. Dry April = weak stand. We've had such a mild fall that our October/November planted clover has really established and we have a blanket of clover already.
Unless your plots strips are bigger than they appear in the pics, IC Peas and Sunn Hemp won't have a chance, neither will Buckwheat. I did a small strip like that with a full 50# of IC peas and they got wiped out before 4" tall. We can't even get a 3 acre field of IC Peas to grow on our lease anymore due to the deer. On my 20 acres near you, I can get 1 acre fairly well established before the deer start stripping it down to the stems. I'm going into my 3rd year there and the local herd expects food for them, so I think it will be harder to establish. I put Durana clover on my land last fall because I want the clover to feed this summer rather than IC Peas. If it peters out, I will go back with IC Peas in July but I hope I don't have to. Just want to mow this year, not fool with planting until November.
I don't see deer using the 5 acres of Bahia I have at all.
So all that to say that IC Peas, Sunn Hemp, and Eagle Soybeans are about your only option for spring/summer plots in Florida but unless you can put in an acre, I wouldn't even fool with it. With such small plots, even if you got something to grow, it's not going to move the needle on herd nutrition. I would work on hacking and spraying to let more light into the areas you have, and then come Columbus Day this fall, go heavy with rye/wheat/oats/chicory/clover and fertilizer. Having the best food in the fall will concentrate your deer for hunting opportunities and the clover might carry you through most of next summer to do it again.
These are my plots near you:
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