Poorly photonia trees
Just over 28 months ago we bought 5 photinia treesabout 8ft tall. With advice from the nursery we planted them in 100l tubs as we wanted them to shield a rather ugly motor home parked immediately next to our rear fence. Tubs were necessary as the area was York stone paved. They are now covered in blossom but seem to have list almost all their leaves! Will they grow back? I have used s good recommended fertilizer.