24+ Hydrangea Turning Brown After Planting. Another reason your hydrangea leaves are turning brown could be a fungal infection. Thread in the hydrangeas forum forum by alexakaran:
Ditto if your flowers wilt during the day and don't bounce back at night. Hydrangea is planted as a potted plant. Learn about common hydrangea problems, including hydrangea leaves turning red.
They cause the leaves to wither and die.
I have two endless summer hydrangeas and they were doing great for about 2 months after i got them. I have worked with the soil so that it changed to blue. Ditto if your flowers wilt during the day and don't bounce back at night. A problem many people have is there hydrangea leaves wilting and turning brown.