Collecting hydrangea seeds is a challenge, and growing from seed is also quite difficult. Cuttings are the preferred method of propagation. Take a cutting from new growth and dust the stem with root hormone. Remove most of the leaves and cut those that remain in half. Put the cutting in potting soil and place a plastic bag like a tent over the plant (to keep moisture in). Once the cutting starts to root, remove the bag.
Collecting hydrangea seeds is a challenge, and growing from seed is also quite difficult. Cuttings are the preferred method of propagation. Take a cutting from new growth and dust the stem with root hormone. Remove most of the leaves and cut those that remain in half. Put the cutting in potting soil and place a plastic bag like a tent over the plant (to keep moisture in). Once the cutting starts to root, remove the bag.