Do not prune the Hydrangea. You will cut off next years buds. They bloom
on the previous years wood. This Hydrangea may not bloom in zone 5 or lower
with out winter protection. Let us know what zone you live in and we can
discuss winterizing.
Good luck

Gary

wrote in message
ups.com...
I have two Nikko Blue Hydrangea plants. I bought them in 2004.
They did not flower this year?
One of them looks like it might be suffering from rust. What should I
do?
Should I prune them during the fall?

Comment on any one or all.
Mary