BF&Bone + Pieris

Hi LD, well Peiris like fairly acid soil but I do grow them in my sandy neutral soil without any problems. I reckon your Pieris is right out there in the Sun and the leaves turning white are a classic sign that they are not liking it. They are better off in light or dappled shade and you should find that the colours will return to the new growth. Another thing is that they really only like rain water and watering them with a hose or Watering Can full of tap water is something they don't appreciate.
Blood, Fish and Bonemeal is a great fertiliser but it is also a slow release fertiliser so you won't see a quick benefit from it. If you can I would move the Pieris into a more shady position and water it with rainwater if possible. I would also use something like a soluble fertiliser like Miracle Grow in rainwater to feed it until it get settled.

 

To be honest I would wait until the Autumn if you're not in a rush. You won't really change anything right now by moving it and although the weather is cool and wet at the moment I wouldn't risk moving it. I'm not saying you can't move shrubs now, and I have, but since the Pieris is yours and not mine I wouldn't want it to suffer and then you tell me off!!!