That's awsome, I am currently trying my hands on a couple cuttings I got, but have not known whether or not they are sucessful. Only way I have propagated is by layering, but I like your method LOL! What a great surprise good luck with them.

LAst summer I planted a Forever Summer which did not suvive but in the Spring I discovered that a side branch had and had rooted. It is very small and not blooming but maybe next summer.

I have been propagating hydrangeas for about 20 yr. When I prune them, spring or fall, I just put the cut off pieces in pots of soil, and keep them under the apple tree. I have given away dozens of blooming plants yearly. A nice way to increase your shrub area, and also have ones to give away. I use them as gifts to new homeowners. Also if it is blooming the first year, that is because the flowers were already there in the cut off tips. I found out that just because they are blooming, does not mean they have roots on the new stems. Just keep them in the shade for a yr. or so until they resist being pulled out of the pot. Good luck on your new venture! It is lots of fun, and a great challenge.
Darlene