Thanks for your comments. Actually I did talk to a local garden center and
they said that it was a combination of heat stress ( we've been in mid 90's
for a couple of weeks) and a fungal attack. They recommended a fungucide. I
selected the Immunox because I had it on hand ( use it on the roses where it
works great). The label neither included nor excluded Hydrangea and it
claimed to be usefull on many garden and flowering plants. It did caution to
try it on one plant before treating everything but since I only have one
Hydrangea.....


Ron H.