Zeedman
Garden Master
Only??? The record annual precipitation in my area was 43", and the ground was so wet that I never got my rural garden planted. Well-drained soil would dry more easily, especially on a slope... but that you can garden at all with that much rain is astonishing.We only get about eight to ten feet of rain a year so we aren't in a particularly wet area.
I get that if the wall is not permanent, you wouldn't want to use concrete. Still, it might be a good idea to fill in the holes around the rods with gravel or sand, to stabilize the wall structure.Yup, the metal stakes will go into the holes in the concrete blocks to hold the whole wall together. Even though the soil stacks really nicely, it's still good to have the blocks held together with the metal. It's just dry stacked concrete blocks so the metal will hold it together. Also, since it's dry stacked (not mortared together) any water will leak right out.
That was my first thought also, especially with the wide range of fruit that can grow in your climate. A fruit forest would stabilize the soil. During the time I spent in the Philippines, I observed that you can get a heavy & nearly continuous yield from papayas, and from bananas (which are a vegetable when eaten green).really, when you are in that kind of a climate you can do some small scale gardening on the ground level, but with so many tropical fruit tree and other species i'd go with those and aim for a food forest. trying to always keep back the surrounding growth from shading a garden area would be a ton of work. why fight nature to that extent?