Hydrangeas

Hope these help.

https://www.youtube.com/watch?v=rV-KQMRrrQY

https://www.youtube.com/watch?v=91PUxQsmvSo

Spring or Autumn to prune. Transplant after fall

Most hydrangeas grow on last year's wood. Weed out older dead stalks and top the dead blooms before new ones come on in the spring (or fall if you choose). I like leaving the spent mop heads on for winter interest. Do not cut back all your stalks, they do not grow back out, the plant only grow new stalks. If your hydrangea is a quite large variety for the space it is in, you might consider moving it to a better location. I cut one back and learned the hard way, the old hardy varieties take a long time to grow back. Some newer varieties may bloom thru til fall. I am not sure if they bloom on last year's wood or on all wood. Read up on your plant variety. Good luck.

now

You should trim the hydrangeas as soon as they are finished blooming. I would say the best time to transplant would be the same time. They will have time to recover that way.

Here's a helpful post on how and when to prune hydrangeas: https://www.hgtv.com/outdoors/flowers-and-plants/trees-and-shrubs/hydrangea-care-to-prune-or-not-to-prune-your-hydrangeas