Last year I did a kind of hybrid hugel where i dug down maybe 3 feet, filled it with branches, leaves, old old old horse manure, and everything else organic i could find around. I then took all of the dirt i dug up and covered everything with it. The end product was about 2 feet tall and 50 feet long. I pushed some pumpkin seeds into it and let it go. It worked great, we had pumpkins sprouting all over the place and i never had to add anything and barely watered it. On a side not, a cottonwood has started growing out of it (i buried some cottonwood branches) so now I'll have an anchor tree in there too. I'll try to get some pictures when i get home today...
