I'm planning a small food forest in my old vegetable garden, which is a site with full southern exposure and native woodland on the west, east, and north. I'm planning a series of swales with lots of wood in the berms. Climate is recently semi-arid; we're in a multi-year severe drought, but this site has in the past been under 4 - 6 inches of water during heavy flooding rains. My question is how far apart should I plant my fruit trees? Fruit species contemplated are fig, mulberry, persimmon, pomegranate, goumi, goji, jujube, loquat, pineapple guava, pindo palm, with support plants of various leguminous shrubs and small trees. In the the PRI DVD "Establishing a Food Forest" the trees and other plants seem very close together, but that's a very different climate with more rain than here, I think. Lately we've been getting about 10-12 inches per year, with the average supposedly something like 28 inches per year, but every few years we get floods. Sun is intense most of the year. Any spacing advice is welcome!