Seems like the obvious banana circle has not been mentioned, so I'll mention it.
Bill Mollison claimed an 85 times greater yield, and I wouldn't know personally about that, but I've been growing non fruiting bananas in zone 7 and have thought about a dwarf I heard of since I've had lots of success, albeit not with fruit, just with health and size of plants, even though they die back every winter.
It looks like if temps would stay a little closer to freezing and not go into the 20s, above ground growth might continue.
Anyway, dig a circle pit about 1/2 to a meter deep, 2 meters diameter, mound the soil around the edge and fill the pit with mulch--yes they do like lots of water, but the mulch pit is great at moderating the extremes of water. i would guess the circle helps a little with the wind also. guessing spiders may be more of a problem where it doesn't freeze seasonally.
Anyway, 12 plants to the circle and when they put off shoots, keep one from each plant for the next crop--all on the same side so the next crop is a little left or a little right of the previous.
In the tropics they throw logs and everything in as mulch, likely in Texas you might want to go with lighter
wood and misc compostable garbage.
I have an abbreviated circle since they aren't really productive of anything but shade, but after i dug the mulch pit next to them they dramatically increased in size
Sweet Potatoes are supposed to be a great crop to grow on the mulch, Tarot might do well also, maximizing the yield and controlling weeds. I put my tumeric plants out close to them but keep them in pots since they have to come in and over winter inside here. Down in Texas you can likely just plant the Tumeric in the mulch also.
