Types of espalier- so pretty! -- be sure to pick the right type of apples (or other fruit) for your growing area -- it is easier to grow certain apples in a certain shape (all trees have a natural branch shape) - check them out before you start.
Create Small Fruit Trees with This Pruning Method - Organic Gardening
This revolutionary pruning method will give you more fruit growing options, because nearly any deciduous fruit variety can be trained to stay compact. Learn how and when to prune fruit trees so that they’ll thrive, even in small gardens. From MOTHER EARTH