My thought on the wire cage for growing.....here it will not work, it will dry out too fast.
A solid wall would work, LOL, first to mind was some way to stack cement double blocks, that could be fun, if one left some of the blocks sticking out like an arm, you can drop about a 5 inch pot of herbs in there to grow.
Maybe that is how to get the hole in the wall for the pots....turn one sideways and you would have a hole, but the next would be in the normal block wall style.
This year, most people used barrels and old tires to stack and grow pots in.
That wire cage in the photo, does work for a ‘personal’ compost bin, when one is not good with the giant compost bins.
Make the same wire cage, make sure it will stand and not fall over and plant around it.......you will throw leaves, weeds, and once in a while well rotted manure on top of it and water it in.......instant compost tea.....and is my way of making compost, old trash cans work fine, if there is no bottom in them, and one day you tilt them and and dump the black gold out.
My best and favorite is a large cone about 3 foot tall and almost that diameter, I sit it in the greenhouse or yard bed and plant all around it.........when I wound up with a couple rabbits, I set the cage on top of it, so they gave it manure daily and when I watered, I stuck the hose in the cone and let it make tea every time, as I pulled weeds, etc, I stuck them in the cone and fed some to the rabbits.
Bill drew a line of refusal, when I asked for a pulley set up full length of the greenhouse, to hang rabbit cages on and move them each day, so they kept adding manure all over.
Sounded like a good idea to me, rabbit factory at the source, fish in the barrels of water, I posted something on that early in the thread......and a goat...for that I bought the seeds of weeds such as amaranth that will grow to 6 foot and can be used for hay....
No wonder folks call me nuts.