Spotted laurel leaves
We have two spotted laurel in the garden. One against a south facing fence, the other facing west. They seem to be thriving, except for the appearance of black marks on the leaves, mainly in the south face plant. (Photos of a leaf attached)
We have had no success at identifying the cause. I remove the leaves that show damage. Am I doing the right thing, or do they need spraying, more food or water or just leaving alone?
Many thanks in advance..