Every year at the end of July or first of August, when the flowers on the big colorful hydrangeas begin to fade, I attempt to root some of my favorites from my garden (remember do not propagate patented ones). I generally have about an 80% success rate following the step by step procedure illustrated above. Once they are potted put the pots with the cuttings in a shady, cool (if that is possible) spot. I lightly water them each day. If you can mist them, that is even better. In about 6 weeks you should know which plants are growing and rooted and which are dying. Do not fertilize until early October, and I sprinkle about a half of tablespoon on each pot of something like 15-0-15 and water in well. As winter approaches, I heel (mound soil around) the pots in a protected area preferbaly next to a structure. Most years I have blooms the following summer on the young plants.