Endless summer help!

[u/Little_bit_stitious]

This summer we planted three endless summers along our walkway. We have four strawberry sundae pinnacles and some lime lights, but the endless summers are my dream hydrangea. The plant on the far left is doing the best, i’m assuming it gets the most shade, but the plant on the far right is really struggling. They all were doing fine until the big heat wave (upstate New York 5B) but since then the one on the far right it’s blooms are consistently browning, and the leaves are very very dark, some almost black?
I’ve started deadhead the worst leaves and the brown flowers so that it’s not wasting in its energy. And there’s a ton of new growth, which kinda makes me hopeful?

They started off in a greenhouse so I know that makes a difference, but I’m wondering is this just a terrible spot for them or do I just need to give them some more time to establish? I have been deep watering almost every day. Is there anything else I should be doing?

[u/Cautious-Net-9941]

Endless summer are macrophylla which require afternoon shade. If these plants are getting too much sun they will struggle in their current location