OH dear. I bought Pink Beauty (Hydrangea ser. Acum. Preciosa) at Sprainbrook Nursery in late May – it has done beautifully all summer.
It was a 10 gallon (at least) size – probably a three year old. I just returned from a week away in the Berkshires (ah cool weather!) and it is almost dead! There are a few stems with live leaves but the majority of the plant is dead.