Posted: 21/08/2015 at 17:00
It looks as if it's being strangled just below the canopy by some plastic washing line or something, and tied to a fence (?) That won't be doing it any favours Len.
It needs to be correctly staked - with a support low down at an angle so that it can gradually strengthen the main trunk.
It should also really be in a spot where there's no competition for nutrients too. The grass will take water and goodness from it so, ideally, you'd clear an area of grass about 3 feet round the base and put plenty of nourishment in the ground, as KEF has said. New trees need copious amounts of water in the early months, especially coming into summer.