Espalier trees are often grown against a wall, traditionally brick or plaster, but wires between posts can be used to support and train the tree. Using this method the tree creates a part-wall perfect for dividing areas of a garden or edging a kitchen potager, while still retaining sunlight and visibility. 

This method of tree training is attracting interest with New Zealand gardeners keen to create a compact and attractive tree feature. 

Take a look here to find out how to create an espaliered fruit tree in your garden.