I heard this on a podcast the other day, staring to do some research on it, looks pretty interesting for those people in low rainfall areas. Started in 2008, Knoxville Permaculture Guild, became a registered nonprofit in August of 2015 exercising under the Appalachian Community Fund as a fiscal agent. Google will return many hits on it. Hugelkultur From Appropedia Jump to: navigation, search Hugelkulture is the practice of composting large woody material to create a raised garden bed. It is a way of dealing with excess amounts of woody garden wastes, for example prunings, hedge clippings, brassica stems, or brashwood. The name comes from German - hügelkultur translates as "hill culture". The technique involves digging a circular trench about 1' (30 cm) deep and 5' (1.5 m) wide, in the centre of which is dug another hole 1' (30 cm) deep hole. The material is piled in. Turf (grass) is then stacked face down on top, then layers of compost, well rotted leaves and manure, etc as available. The layers break down slowly and creating rich humus over four or five years. It is claimed that this is ideal for growing hungry crops such as zucchinis (courgettes) or strawberries. As the years pass, the deep soil of the raised bed becomes incredibly rich and loaded with soil life. As the wood shrinks, it makes more tiny air pockets - so your hugelkultur becomes self tilling. The first few years, the composting process will slightly warm the soil giving a slightly longer growing season, in temperate and cold climates.