I noticed last week there were some darkening leaves on my hydrandea bush that is very established. I thought perhaps it was just the change in weather. Now the leaves are all looking very unhealthy and am wondering what is attacking my plant and how to correct it. My hydrangea of the same variety on the other side of my house is also starting to turn but is still in the earlier stages. This seems to be progressing very quickly. Help!
Linn County Oregon