Prepare Hydrangea Tree for Winter

Hi. I have a hydrangea tree in my front garden. I live in a zone 5. There is sun in the afternoon where it’s planted. It did not flower very much this summer. I would like to prepare it well…

Hydrangea Tree*

How do I know if or when my tree is suppose to bloom, as of right now it looks dead and I don’t see any buds?…