Last year the summer had a long and hot dry period. My father’s Cunningham’s White (Rhododendron ’Cunningham’s White’) did not make it.
We simply did not think that it was quite new plant and would have needed more watering and in the end it just dried out.
Managed to find a new plant and will take it to my father as a birthday present when I go and visit them next time.
Cunningham’s White’s flowers are a bit pink in the beginning but turn bright white when the bloom grows older.