Propagating Hydrangeas

My Hydrangea was purchased at Walmart in late winter, where it was forced into full bloom out of season. I am hoping to keep it alive enough to be able to transplant it outdoors.
I cut green limbs that were showing signs of budding and cut the leaves in half, so the energy will concentrate on forming roots.
I have read that cinnamon is a good substitute for rooting hormone, so I gave it a try.
I placed them in potting soil and a sunny windowsill, crossing my fingers and waiting to see what happens!