Well, so far so good. Think it is a Mophead, don`t recall. I got it 2 winters ago as a houseplant housewarming gift
and last spring planted it in the yard not expecting it would survive the winter, I mulched it well. Anyway it keeps
growing and so far it has surprised me as I did not think the ones they sell at grocery stores are meant to go out
in the yard......now if it blooms I will be in total surprise mode.

We'll keep our fingers crossed for your hydrangea. If it blooms this year, maybe you can post a photo to get it identified.
I received a potted hydrangea for Mother's Day one year with no name. I planted it in a large pot since I didn't know if it was hardy enough. Later identified it as some German cultivar that's only hardy to zone 6 or 7. It spends the winters in my little hobby gh.

Will post a picture if it blooms for sure!

we got one as a gift last year as well! ha! doubt it will flower this year since we cut it back a bit and shaped it some.