The afternoon sun will affect the leaves and they will get sunscorch during the warmest part of the year... say July-August. Happens with serratas here. You could add 30% shade cloth to reduce the impact from the sun ... In some locations where the sun is weaker you could try planting it in such a location, monitoring it daily and then move if the location becomes a problem in the mid-to-late summer months.

I'd honestly choose another plant and put the Hydrangea somewhere with afternoon shade. Shade cloth isn't ornamental, and full western sun in TN will make the plant(s) leaves look damaged. You could try one of the smaller Hydrangea paniculata types such as Bobo. They are white-flowered, turning pink late summer, but are long blooming and far more sun tolerant. I can grow them where they get more than 12 hours of sun here, but I haven't ever gardened as far south as TN. Or choose another type of shrub entirely that is more tolerant of hot sun.

It will not survive. It does not like that much direct sun.

I love TS (I have 3 of them). I am in a zone 5/6 (Canadian) and for a time I had one TS in afternoon sun and it 'melted'. So in a zone 7 it would be even worse (consistent moisture might help some). (The best one I have gets very little direct sun).

Thank you all. I'm looking at some shaded areas for a possible location.