What is wrong with hydrangea 2?
The two hydrangeas in the two pictures have been thriving all summer long. Suddenly hydrangea 2 looks like it has a death wish. Hydrangea 1 still looks happy but I am concerned that Hydrangea 2 has a disease of some sort. Can you tell anything from the picture? Thanks.
It looks like your hydrangea got too dry. Hydrangeas like a somewhat moist soil. Is it in a sunnier location compared to the one that looks healthy? It does not appear to have symptoms of a disease or pest. Most likely it got too dry.