Howdy, JB...
Those cuttings in my pic above were taken in the late fall of last year and I think that pic was taken around early summer. They are well-leafed out because I got so far behind in potting things up this year but none-the-less they made the up-potting transfer very well.
I just took cuttings of the same hydrangea again about a week or ten days ago; now is a good time since we haven't been hit by any hard frost or freeze.
Shoe