Cercospora Leaf Spot
It's been affecting my Endless Summer hydrangeas (not the Annabelles & Blue Billows), maybe a shrub rose (not entirely sure). The hydrangeas bloom well & appear healthy except for the Cercospora reddish-purple spots. Are there any organic sprays that might help prevent infection? I clean up the infected leaves, don't crowd them, etc., but none of this seems to make any difference. I'd rather not resort to store-bought chemical fungicides if it's avoidable. Because they bloom so well for me, I'd hate to shovel prune them.