It is too young to know for sure but it reminds me of a wild strawberry that grows in this area!!! Ha!

The hydrangea leaves that I am used to seeing are more serrated than the ones in the picture. The leaf endings in the picture have a more angular, half-moon, look instead.

If you disagree, I would keep it until it blooms to know for sure. Looks quite healthy anyways.

Definitely NOT a hydrangea - there is no indication the plant has any sort of a woody framework (or will develop one) and the foliage looks nothing like that of any hydrangea species.

FWIW, the plant looks very much like some member of the Lamiaceae........I'd guess Plectranthus.