Most Macrophylla Hydrangeas I would suggest only morning sun. Although the Togethter handles mid day sun very well in my experience. Remember the first year it will wilt very easily and will need watered daily in heat waves. My Together's now after being established seem never to need additional water. I would dig out a hole atleast twice the size of the container you are planting and replace it and mulch very well. Also the Together is a very reliable bloomer.

If you would like a nice companion reblooming hydrangea for the Together. I would suggest a Let's Dance Starlight. It handles sun very well also and is a very reliable bloomer. Along with it stays a smaller size also and it is a lacecap flower instead of a mophead. I think these two look very good in a planting together.

P.S. I would hold off on any fertilizer till next Spring. FE post on their website to give them 10-10-10 in the Spring. They should have fertilizer already in the soil from the nursery.

I got one of those for my friends garden. It is doing well and the color of the blue is awazing. It is a deep coral pink color with white edges. I think I am going to get one as well as since I have planted it about 4 weeks ago the plant has doubled in size
i got it for 12 at Lowes!
beautiful beautiful flower

I snapped a few pictures of one of mine today.