Espalier it’s a system of growing dwarf fruit trees on espaliers where they are grown in an intensive way and can be easily covered by netting when needed. It’s not an original system, in fact, in Europe because shortage of suitable land and it’s high cost many, or most orchards are now being grown in this manner.
Guide to Urban Homesteading - Homesteading and Livestock
See our ingenious pruning method for growing an orchard in a small backyard. Shown: Kept small with timed pruning, this 'Fuji' apple tree stands about 4 feet high and wide and produces an ample crop of full-size fruits.