What to plant in a feshly made huglekulture in sandy South Florida?

Hello!

I'm in Boyton beach, South/coastal Florida visiting my aunt and installed a huglekulture. The soil is in PURE sand (it is literally an ancient sand dune). I dug a hole, put down a layer of straw, then a layer of fresh horse manure, then more straw. My hope is to create a gley to hold in moister. On top of that I layered oak limbs and branches with some other unknown leafs/branches. On top of that was very soiled sawdust from horse pens, then a layer of pure horse manure, then a thick layer of straw for a mulch. There is NO soil in this region so that is not an option. The closest thing is partially decomposed plant matter called "muck" from drained everglade regions. The normal veggie growing time here is during the dry, warm winter, the summer is very hot and wet.

My questions!

What would be good to plant in the summer for the hot, rainy season? Which perennials might work here? I think she wants to plant all of the "normal" vegetable in the winter but any other suggestions would be great. Thanks!

Taro. But plant it at the base of the hugel, where water might tend to pool, it really likes "wet feet".

I live just up the coast from you in Melbourne, and am doing hugel mounds with truck loads of discarded biomass. As I build my mounds, I apply sand regularly in thin layers to fill in the gaps. Sand will buffer the manure and rotting biomass and make the mixture more crumbly.

Summer crops: sweet potatoes, okra, certain peppers, Seminole pumpkin squash, yard long beans.