- 1). Examine an existing hydrangea plant and find a stem that's at least 6 inches long, has two to four leaves and is lighter green than the surrounding stems. The lighter green indicates that the stem is new wood and probably has not developed a bloom this season.
- 2). Cut the stem off 5 to 6 inches from the tip, using sharp pruning shears.
- 3). Pull off the leaves from the bottom of the stem, keeping the top four leaves, which are arranged in sets of two.
- 4). Fill a plant pot with coarse sand and wet it until the sand is thoroughly moist. Create a 1 1/2-inch-deep hole in the center of the sand, using your finger.
- 5). Dip the end of the hydrangea stem into the rooting hormone and stick it into the hole in the center of the sand. Fill in the hole with additional sand until the hydrangea cutting stands upright on its own.
- 6). Stick three wooden stakes, or pencils, into the soil around the outer edge of the pot. Place a clear plastic bag on top of the hydrangea so that the plastic rests on the stakes, not the hydrangea. Set the pot in a well-lighted location out of direct sunlight.
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