Propagating Hydrangeas from root cuttings.
How to root cuttings from hydrangea, first select a stem for cutting. In early Fall, choose a stem for hydrangea propagation that is at least 6 inches long, has no flower and is new growth. A new growth stem will be a lighter green than old growth. Be aware that if you live in a colder climate where the hydrangea dies back to the ground, the whole shrub may be new growth
Once you have selected a stem to propagate the hydrangea, take a sharp pair of shears and cut the stem off just below a leaf node. A leaf node is where a set of leaves will be growing. The hydrangea cutting should be at least 4 inches long and should contain at least one additional set of leaves above the selected leaf node. Snip the cutting from the stem. Next, strip all but the top most set of leaves from the cutting. The cutting should have only a few leaves left, dip the end of the cutting in rooting hormone. While rooting hormone will increase the chances of successfully propagating hydrangeas, you can still propagate hydrangea shrubs without it.
Place the cutting into damp potting soil. Cover the pot with a plastic bag, making sure that the bag does not touch the leaves of the hydrangea cutting.
Place the pot in a sheltered location out of direct sunlight. Check the hydrangea cutting every few days to make sure the soil is still damp. In about 2-4 weeks, the cutting will be rooted and your hydrangea propagation will be complete.
That is all you need to know about how to propagate hydrangeas. With a little effort and care, you can start propagating hydrangeas for your landscapes or for friends and family.
