Having recently moved into a new house we've been surveying the new garden to see what can be saved. We have what appears to be a very sickly Pieris (or maybe mexican orange blosson - happy to be corrected) in one area what was surrounded by couch grass and moss.
The leaves on the Pieris appear to be suffering some sort of problem, being a yellow tinge and being horrendously black spotted. They also feel quite hard and crispy to the touch. At first glance it really does look a state and we thought it wasn't savable. However we noticed before pulling it out that there are some fresh buds forming along with some red flowers starting to sprout (this is what made me think Pieris) and that it might be worth trying to bring it back to life.
So far we have added some ericaceous compost and cleared away all moss as best we could. We're also watering it.
My question is. Do we need to remove the extremely sickly looking leaves or are they still serving some sort of purpose? If so how far back should we cut it?
Any thoughts would be most welcome. I'd rather give a go of saving this plant than putting something new in.