I wouldn't.

Cutting off flowers or flower buds will NOT reduce any stress the plant is experiencing. Not exactly sure what your weather is like at the moment (except for freakishly large hailstorm the other day) but I'd consider this to be rather normal transplant shock, especially if the plants are in a lot of sun. And seeing the purple fountain grass in the background, I am assuming that is the case.

Just keep the plant adequately - but not overly - watered and it will bounce back in a few days.

Thank you all for the advice. I will leave them alone. These only receive morning sun, about 4 hours and then a little dappled sun til around 2 pm. The purple fountain grass was just recently planted also and I do believe it was in full sun at the nursery. Also...these were sold next to Endless Summer at the nursery but they are not. They are the same kind of hydrangea as ES but I'm guessing a generic??? I'll have to research on if they are re bloomers.

Plant nurseries normally sell named varieties so stop by to find out what the other one is called. That other one could be part of the ES Series or it may be another named variety that is either a rebloomer or not. The ES Series usually uses a blue plastic pot for mopheads Endless Summer (sometimes called Original in that company's ads), Blushing Bride, Bloomstruck and a lacecap called Twist and Shout.

They had all the ES you mentioned and then they had these labeled only Hydrangea macrophylla in black pots. I think they are mopheads not lacecaps but still researching to see if they are re bloomers. It would be great if I could go ask the nursery but it seems they do not have much info on anything they sell. Houston Garden Centers. New employees every time I'm in there.

And.....here comes the rain. I'm excited for my plants!!!

The back pots are sort of generic, cheap containers. They may be used by every company. It would not surprise me to see them in use by the Endless Summer Series' company too, although they normally use the blue ones. I think they discontinued some hydrangeas but switched to selling their remaining inventory of those using the black pots.Probably because they were not selling well and probably because they were not re-blooming well either.

So, unless you can locate the plant label, talking to an employee or finding a sales receipt with a full name of the plant, you may have determine their re-blooming capabilities by simply waiting to see if they produce more blooms in about 2 months, approx. On those that are re-bloomers, you can deadhead the blooms to force it to generate new flower buds.

Rains and thunder/lightning passed thru here also and got the hydrangeas all wet.

Thanks for the advice. I will just have to wait and see like you said.

Stay safe over there! More rain coming I hear.