Rhododendron Dora Amateis
My 10 year old Rhodo Dora Amateis had been struggling a bit so last autumn I moved it to a more sheltered spot, in ericaceous compost and bonemeal where it has overwintered. I thought all was well when it was covered in blooms but they failed to open and the (very sparse) leaves have browned. Please can anyone advise me on helping to restore it? As the leaves are just at the very ends of the spindly looking branches, could I prune it back? If so, when would be the best time?