Posted: 10/04/2013 at 22:22
Hiya red dalia
You didn't mention fertiliser. In my experience....grown two and another for a friend.....they don't like cultivation around their roots.
If mine, I,would give it a generous solid feed, preferably organic, water it in and then mulch.
In addition I would lightly prune to buds.....waiting for them to become red shoots....all over the bush.
I apply a seaweed spray on any troubled or sickly looking plants.....as a tonic it has few equals......and would do same to this photinia
I know Photinias are often grown as a hedge, suggesting they are tough plants, but they can be fussy and disease prone.
Last summer and since it has.been very wet and on clay it would not have enjoyed this. Feeding and better weather may well improve matters dramatically