I live in North Carolina and would like to transplant 3 endless summer hydrangeas. Is this time of year ok to transplant?

The best time to transplant hydrangeas is late fall or early winter while the plant is dormant. Moving it while the hydrangea is actively growing can prevent it from blooming in the short term, or cause some long term damage if it tries to establish into its new home while extremely warm: https://www.instagram.com/tv/CGINEJsg4Vs/?igshid=2jzuq7naf4kp. I hope this helps!