What kind of leaf damage is this on my Hydrangea?
NOTE: link to picture of damage below.
I live in Boston and planted a hydrangea over the 4th of July weekend. It gets several hours of afternoon sun. It has been hot and I underestimated how much water it would need. Plant is definitely stressed, with some leaves browning and falling off. But this morning I notice brown spots/holes in the leaves. Is this sun damage or worse?
I'm a complete novice and any help is much appreciated. Thanks.
Here is a link that might be useful: picture of damage