Hydrangea

My parents were given this hydrangea as a gift for their 60th wedding anniversary in 2008. It has been in a pot in my garden ever since and has always produced a good number of large blooms. I fed it as usual this year and kept it well watered during the very dry period (at least I think I did!) but this is the sole bloom this year.
Hopefully, with some more tlc over the winter and spring it will be back to its old self.