I have I think a variety of Arbutus. it seems to be suffering in some way. im wondering if you can have a look at the pictures and see what you think, and if i can treat it.
It looks to be suffering from wind damage, leaves withering. This probably occurred during the February storms and it likes reasonable shelter.
There is not much to do. The grass in a 2-metre diameter might be controlled with weed fabric and mulch placed on top to depth of 8cms to give the roots a boost.