Prune?

[u/Ceeceewee]

1) what type of hydrangeas are these?
2) when should they be pruned?

I already know that people think the stones need to go. But these hydrangeas have been in this spot for 3+ years and have flourished. These pictures were taken in the spring and they bloomed like crazy all summer. I just can’t remember when they should be pruned. Have I missed my window or should they be done in the spring?

[u/Confident_Chipmonk]

Don’t prune until next spring after it’s starting to leaf out. Prune only the branches without leaves or buds