Karensusan63's Garden
Apple 'Katy'
Genus: Malus.
Species: Malus domestica.
This is what is known as 'Espalier' trained, in a fan shape against the front fence. If you want to keep it that shape you will need to prune it.
Prune shoots growing from the horizontal branches between July and September leaving three or four leaves, and shoots growing from the main stem shortened to three leaves.
Regularly tie down new growth at the ends of each branch to stop it growing upwards.