Tea rose can be propagated by grafting. Multiflora rose (Rosa multiflora) is often used as rootstock for grafting. Generally, grafting is carried out from the end of summer to the beginning of autumn, and the grafting part is as close to the ground as possible. Cut a T-shaped cut on the outer skin of the rootstock with a knife on one side of the stem and branch, then select a bud from the middle of a well-developed branch in the same year, cut the bud with bark, insert it into the T-shaped cut, bind it with plastic film, and place it in proper shade. It can usually be untied 15 days after grafting, and will germinate and survive after 30 days.
You can also select a branch that has not yet developed a leaf bud as a scion if the thickness of the scion is more similar to that of the rootstock. Cut a 2 cm deep cut on the rootstock longitudinally, insert the scion into the cut, and then fasten it with plastic film. The incision will heal after about 10 days.
Tea rose can also propagate by division. It can be planted deeper and filled with soil to the roots so that new roots can grow at the bottom of each branch. In the early spring or late autumn, the whole plant can be dug out with soil to be divided into ramets. Select a stem with 1-2 branches and some fibrous roots, and then separate it from the whole plant and plant it in a basin or garden. At the same time, prune the branches on the ground to reduce the evaporation of water and improve the survival rate of transplanting.
Cutting propagation, another useful way to propagate tea rose, is generally carried out in spring and autumn. Branches with 3-4 buds can be cut off to use. The substrate for cutting can be a mix of river sand, rice chaff ash, or vermiculite, etc. Insert the branches into the substrate, shade it properly, and spray to maintain humidity. The branches will take root 20-30 days after cutting, and the survival rate is 70-80%. If the branches are dipped in rooting powder and then inserted into the substrate, the survival rate will be higher. Additionally, the cuttings can be immersed in water for cutting; the cutting temperature is 20 to 25 ℃, and new roots will grow after 20 days.