For those of you living in dry or drought areas, I can only stress the importance and usefulness of hugelkultur as a way of constructing gardens. Basically a pile of downed limbs, branches, brush, roots, dead logs laid in a shallow trench, covered with sod(grass side dow), watered heavily initially, that covered with good soil. The finished mound should be about 4' high, 4' wide and as long as you like with about a 45 degree side slope. It will be virtually self-watering and self-feeding, will stay that way with just a small amount of rain and will product a lot of food when planted on the sides and top. Where do you get the sod? Tear up your lawn and practice dry gardening. Capture every ounce of rainwater in 50 gal barrels. Here in Spokane we are considered a dry area with hardly any rain in the summer.