Nothing you could do about it. Just be patient. It will wake up. Eventualy.

Do you mean leaf buds or flower buds? It's much too early for this plant to be producing flowers but it should be starting to leaf out nicely. All sorts of variables will influence exactly when this happens, climate and current temperatures being the primary factor, but if the buds are present and green, it should happen soon as George said :-) And you can cut off the old the flowers if you wish. Many gardeners treat this activity as a routine grooming process on various hydrangeas each season. Often they won't fall off on their own and will looky messy if not removed.

I have two PG, one Pinky Winky and two Quick Fire, they are just starting to get leaf buds. Seems everything is running late this year. Maybe because we all had such a hard winter across the nation.