I am wondering about trying hugelkultur in the window baskets of my council flat. They are basically iron railing baskets concreted into the outside walls that you can use to hold pots or boxes. One of mine faces NW while the other two face SW, and each has about 1ft x 4ft of surface area and maybe 18" of depth if I filled the whole basket. My main problem trying to cultivate them last year was that the SW ones dried out extremely quickly, and when you water them most of the water drips right through. They are also awkward to access from inside the building. Does this sound a likely adaptation for hugelkultur?