Q.I Think There Is Something Wrong With My Hydrangea?
It was my Dads pride and joy … he has sadly passed away and I brought it to my house. At Dads it sat in full sun all day the pot on pebbles. I brought to mine and sunk it in my rickery. I noticed it wasn’t draining after a few weeks so cleared the holes and water poured out!! Thanks It is now sitting pot raised on rocks … but not looking happy sadly. It is in full sun for less hours than at Dads …. But most of day I guess. I really don’t want to lose it!! Is there any hope at all???

Certified GKH Gardening Expert
It looks to have suffered root suffocation. During a cool spell, you may want to prune it back and repot into fresh soil!
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-container-care.htm