What to do if roses root slowly? Propagate by division and turn one pot into many
Seed propagation: mostly used to develop new rose varieties; just germinate the seeds and sow them. Division propagation: new roots grow from the stems of each branch, and once separated they can grow into new plants. Cutting propagation: treat the cut branches and then plant them in soil. Grafting propagation: graft buds or branches onto other plants.
1. Seed propagation
This method is mostly used to cultivate new varieties. Sow the seeds collected in autumn in a bag filled with moist sandy soil, then place the bag in an environment with a large temperature difference between day and night. After 1 month, move it to a place at around 20°C, and once the seeds germinate they can be sown.
2. Division propagation
Plant the rose deeper or mound soil around the base so that each branch grows new roots of its own. Then, by repotting, you can cut apart the side branches that have grown new roots and separate them into new plants.
3. Cutting propagation
Semi-hardwood cuttings: in this method, from June to September, select branches whose flowers have just faded, cut off the flower stalk, cut the lower part of the branch flat, keep 2-3 nodes as one small section, remove the lower leaf, then remove the withered and old leaves, treat with a growth hormone, and insert the cutting.
Hardwood cuttings: use vigorous one-year-old branches prepared before overwintering, likewise keeping 2-3 nodes as one small section, tie them in groups of 10, dig a 30cm pit in a cool room, bury the branches upside down in the soil, cover the top with soil, and keep the soil moist; the cuttings can be taken the following spring.
4. Grafting propagation
Bud grafting: every 5 to 9 days, select good young buds from a healthy parent plant and cut them off with a knife, then graft them onto a 'Baiyutang' or rose rootstock. After the buds take, cut the branch bearing the successfully grafted buds into sections, one grafted bud per section, and then propagate the branches by the cutting method.
Branch grafting: in spring, use the cut grafting or side grafting method to graft the branch onto the branch of another plant.