You can take Hydrangea cuttings at two times during the year. In winter, when you take new hardwood cuttings, and again in summer, when you take cuttings of fairly new growth that has just started to harden a little. This method works with most Hydrangea varieties.
The hardwood cuttings taken in winter will strike easily. You can grow them in containers, and in warmer climates even strike them directly into the garden.
The cuttings taken in summer are placed into a mixture of 1 part perlite and 1 part fine coco-peat.
For each type cuttings should be at around 15 cm (6 inches) long.
Taking Hydrangea Cuttings in summer.
- Make sure that the cutting is taken from a healthy plant.
- Take the cuttings in the morning of a cool day.
- Choose a stem that is not a flowering stem, with three sets of leaves.
- Make the lower cut 1/2 inch below the node where the leaf joins the stem. (Make this cut on an angle)
- The lower sets of leaves should be removed completely.
- The top leaves should be cut back by 1/2 to 2/3 to reduce moisture loss.
- The lower part of the stem should be shaved a little to improve callus formation and stimulate root production.
- A hormone rooting powder can be used. Simply dip the lower part of the cutting into the powder.
- The cuttings should be inserted into the propagation mix and watered in well.
At this stage you need to reduce moisture loss, you can use a soft drink bottle over the cutting, or a clear plastic bag supported on bamboo sticks.
Cuttings need to be placed out of direct sun yet with good light.
You will need to mist spray the cuttings every day or two depending on the heat. In hot weather mist more frequently.
Do not allow the soil to dry at any stage.
- Give the cuttings 3 weeks to develop some roots and show signs of new growth.
- After 5 – 6 weeks pot the cuttings into larger individual pots.
- Pot up again in spring
- You can plant the new plant out into the garden in late the next autumn or early spring.