Make sure to pre-moisten the soil before planting the cuttings. Watering afterward will cause the rooting hormone to wash away before it takes effect.
Now, make holes in the dirt and stick your cuttings in. Finally, cover the cuttings in plastic to create a warm, humid environment for the roots to develop. You can do this by placing a plastic baggie over the pot.
Leave it on for about two to three weeks and remove it once the cuttings have formed roots. You can test if the cutting has established roots by gently pulling on the cutting. If there is some resistance to your tugs, that means there is root growth.
After about six weeks, transfer the cuttings into individual pots. Next spring, you should have new hydrangeas to plant in your garden!
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