1. Sowing and propagation

This method is mostly used to cultivate new varieties. The seeds collected in autumn are planted in bags filled with wet sand, and then the bags are placed in an environment with great temperature difference between day and night. After one month, they are transferred to a place of about 20 ℃, and the seeds can be sown after germination

2. Ramet propagation

Plant some deep roots or let new plants grow in other soil. Then, by changing pots, the lateral branches that grow new roots can be cut and separated into new plants

3. Cutting propagation

① Semi lignified branch cutting: this method is to select the branches whose flowers have just withered from June to September, cut off the stems of long flowers, cut the lower part of the branches flat, 2-3 sections into a small section, remove the lower leaf, and then remove the dead and old leaves, and use growth stimulating hormone for cutting

② Hardwood cutting: the full branches of the year prepared before overwintering are used. The same 2-3 sections are a small section and 10 branches are a group. They are bound together. Dig a 30cm pit in a low temperature room, bury the branches in the soil, cover the top with soil, and maintain the moisture of the soil. Cutting can be carried out in the spring of the next year

4. Grafting propagation

① Budding method: every 5 to 9 days, select good buds from healthy original plants, cut them with a knife, and connect them to baiyutang or rose rootstock. After bud grafting, the branches with grafted buds are cut section by section, one by section, and then the branches are cut by cutting

② Branch connection method: in spring, the branches can be connected to the branches of other plants by cutting and abdominal connection