I think its kind of late to just now be getting started with them, any cutting done now don,t have a very long time to get roots started before they go dorment for the winter. Any cuttings coming off the plants now will cut into next seasons blooms. I,m going to do a walk in knock in april and ask neighbors if they will trade me a few cuttings off thier dark blue hydrangea for some off one of mine. I think that will be a easier time of year to get a few going.

Hi, just bought 4 Endless Summer. What's the proper way to cut and get rooted? I would like to try next spring.

Check the link below on propagation, mayhem69.

Here is a link that might be useful: Propagating Hydrangeas

mayhem69, please drop me an email. Thanks and to you also luis_pr for the information.