

Brown spots
Middle Georgia, zone 8. I purchased this Endless Summer hydrangea about a week ago at a reputable nursery. I haven't got it in the ground yet but I'm noticing brown spots on the leaves. It's been so hot here and it was sitting in full sun, so I thought maybe the leaves were getting burned. But it's been in the shade for almost a week and there are more new spots. What's wrong with it and how do I fix it?