It looks like you don't have enough corn for good pollination. My understanding is that you need at least 4' x 4' of corn for decent pollination. Do you have a plan on how you will get to the plantings in the back for care & harvesting? I think you might want to consider some stepping stones at least. Consider also that your plants will bush out - when we grew cukes & beans on a trellis in a bed 2 feet from the fence they bushed out so much there wasn't much room to get behind them. Also, I have never grown okra, but I've heard the plant can be irritating to the skin. I think it gets pretty big, too. You might think about putting it together & somewhere you won't have to come into contact with it until you want to. Why are you mixing things up? Are you trying to avoid cross pollinating varieties, or going for aesthetics? Or is it for another reason? I would consider putting same plants together because they will have the same needs & you can more easily deal with them as a group. Beans are great & can be very productive. You could substitute them for the corn along the back. Perhaps you could do a block of a short variety of corn (so it doesn't shade other things too much) if you move things around a bit. I am not familiar with your growing area, so I'm not sure what else to add. I see you have cukes growing on the fence, but you have a line of them down into the bed. Will those get a trellis, or are you putting bush varieties in front? Definitely (IMO) put as much organic matter into your soil as you can. We have terrible soil here (sand), but my small gardens are looking lush. We found a local coffee shop that gives us bags of their compostable material regularly. We add that straight to the garden beds (coffee grounds, veggie scraps, egg shells) with some manure (we use quail because it is inexpensive & convenient). Also, we added in some peat moss & vermiculite the first couple of times we were turning over the beds. Hopefully someone with more expertise will give you some good tips. Best of luck!

Oh. Like magic. :o) For sanitary reasons, I’m not sure what you could put there. How about a couple of floating shelves on the wall up above? If you don’t need the storage/display space, I still think just an art print would do it. It is a bit of an awkward spot but its location right next to the toilet kind of gives it an ick factor. Sorry I’m not more help.

To follow up on my question, If I were to allow a second or third main stem to grow (while still pruning all suckers on the secondary stems), could I tie 2 or 3 main stems to 1 stake without crowding the 2/3 stems too much?

Why did you ask for help just to ignore sound advice? What you have, even so far, won't be good in the long run. You will almost certainly have moisture problems between the bed and the wall. Besides mold problems, you are also looking at a bed frame that will rot. Hugelkultur and branches all rot and then occupy less space and aid your frame in rotting.. Without enough space/air flow under the bed, the frame will rot there too. I would advise you to remove what you have done. Line the bed with waterproof membrane and put a few drainage holes only on the bottom at the front. You really only need landscape cloth to stop your soil from leaking out of the drainage holes. If you want to use up space, the best thing to use would be rocks, stones, chunks of brick or chunks of concrete with landscape cloth over top (so your soil doesn't sink into the spaces). This will allow better drainage.