Dwarf Fruit Trees
I want to plant several varieties of dwarf fruit trees but space in my yard is quite limited. I need to plant 2 varieties of apples and 2 of pears for cross-pollination, and I've been told that the "five in one" and "fruit salad" kind of trees don't really work very well. Can I plant my dwarf trees in pairs, with two trees close together (about 18 or 24 inches apart), then the next pair ten feet away, and a third pair (peach and apricot) ten feet from that?
When planting your trees, consider what the spread of the foliage will be when the tree is mature, and plant far enough apart to allow both trees to spread out. This article provides lots of general inormation: http://extension.unh.edu/resources/files/resource000585_rep607.pdf
For the best trees to plant in your area, consult with your local University of Delaware Extension Service.