When to cut the spirea ?
The spirea can be cut as soon as June and throughout the summer.
How to take cuttings ?
Take a stem of 25 cm already a little lignified (wood) on a healthy plant without any trace of disease or pests.
Remove the leaves from the base of the cutting and keep two or three.
Cut the stem above these two leaves to keep only a segment of about 10 cm and plant it directly in the soil leaving just the leaves above.
Choose a shady spot to make your cutting. For this propagation technique to work, you need to find the right balance between the time when the cutting is likely to dry out and the time when it will have the capacity to emit roots. If it is left in full sun or wind, the chances of success are greatly compromised because the cutting will perish before it has time to put down roots.
Water gently but generously at the foot of the cutting to soak the soil.
A trick consists in placing a glass jar upside down on the cutting in order to carry out the technique of cuttings in the smother. A hygrometry close to 100% will thus be preserved and the cutting will be protected from the climatic hazards and from the trampling of possible children or animals thanks to the jar.
How to maintain the cutting ?
Be sure to water regularly to maintain a correct humidity and favorable to the emission of new roots.
It is not necessary to remove the jar before 4 to 6 weeks, period during which new leaves should appear in the armpit of the old ones marking the effective recovery of the cutting.
Wait until winter to remove it and place it in an individual pot with potting soil if you wish to offer or exchange your cutting.
If you prefer to keep it, transplant it in the place of the garden that you will have dedicated to it. Remember to water after this operation, as well as the weeks following if it does not rain enough to ensure a good recovery.
