Take a healthy stem cutting from a non-flowering shoot in late spring or early summer
Cut a 4 to 6 inch section just below a leaf node
Remove the lower leaves, leaving two to four leaves at the top
Trim large leaves in half to reduce moisture loss
Dip the cut end in rooting hormone
Fill a pot with moist, well-draining potting mix
Insert the cutting into the mix so at least one node is buried
Firm the soil gently around the cutting
Water lightly to keep the mix evenly moist
Cover with a clear plastic bag or humidity dome if desired
Place in bright, indirect light
Keep the cutting warm and out of direct sun
Check moisture regularly and avoid letting the soil dry out
Wait for roots to form in several weeks
Transplant into a larger pot or garden location after rooting
Harden off the new plant before planting outdoors
Divide established hydrangeas in early spring or fall if suitable for the variety
Layer a low stem by bending it to the ground, nicking it lightly, and covering part of it with soil
Separate the layered stem after roots develop
Collect and sow hydrangea seeds only if growing from seed is desired