Hoping to assign this to Jill Pollok. I have four established macrophylla hydrangea that have large spots and leaf discoloration, deep inside the shrub is where I am seeing them, some of the leaves are almost all white. I am familiar with Cercospora leaf spot and these hydrangeas will exhibit that disease but usually later in the season. This looks different. I would say perhaps 5-10% of each shrub is affected. The 3 shrubs are sporting healthy young blossoms. There is no overhead irrigation.