I have to plant some
trees on mounds. Until now I made them huegelcultureish, first dig out 30 cm pop in wooden material until it's a bit over the ground, grass clippings on the top and then soil and manure and more grass clippings and comfrey leaves.
We build a dry stone wall around, but now we are out of bigger stones.
If I build the same but without stones, does it work? Do I have to shape the thing different? Do I need a bigger diameter then?