Black eyed peas do well in summer heat. I think purple hulled peas do too. But all of the plants listed would go all fall. A fun one to do with the kids is peanuts and IIRC all three are good soil amending plants. These and watermelon always did well through the HOT, dry late summers when we lived in Southern Alabama.
You could add pumpkins. They take up space but are a great way to naturally deworm your chickens this fall. Pie pumpkins are much smaller than field pumpkins and might grow on a trellis.
Have you thought about using a section as an herb garden? You could plant mint, oregano, basil, dill, thyme, marjorim, parsley, sage, rosemary, coriander or ones for salves like comfrey or calendula.
You could plant the following for edible seeds: caraway, cumin, poppy, dill, mustard
I can't offer much in the way of advice b/c I have no experience with long growing seasons where you can grow much in the way of succession crops. But, I can be your cheer leader! YOU GO, MAN!!!!!
Well im thinking ill plant more black eyed peas....or just go get a bunch of squash for transplant. I already have everything mentioned, except all the herbs.
If you don't have herbs.... you should! So nice to pluck your own fresh herbs! A bit of warning: Mints, oregano, lemon balm all need to be contained in a bucket. They can be way too invasive!
I'm actually wondering if there is an aleopathic effect of mint family against poison ivy. I've never seen creeping charlie or mint growing where there's poison ivy. So... plan to dump my w/b full of mint roots into a patch of poison ivy. What's the worst thing that could happen????