Fantastic how to from Snap guide on how to grow hydrangeas from cuttings.
I love these flowers, especially the blue. Did you ever buy a pretty blue hydrangea and plant it only to have it turn pink a couple years later? I did and then I found out it has to do with the soil ph.
You can turn the pink ones to blue by adding aluminum to the soil. If you are determined to have blue ones you may wish to grow them in containers as it is quite a bit easier to control the ph in a container than in the ground.
BLUE HYDRANGEA 3 SEEDS—- NIKKO BLUE—DWARF TREE SHRUB