Generally, it is used to cultivate new varieties. The seeds collected in autumn are put into a plastic bag filled with wet sand and placed in the environment of night freezing and day thawing. After a month or so, they are gradually heated to about 20 ℃. Seeds can be sown (or stored in sand until the spring of the second year) after they are cracked and germinated. When the seedlings grow 3-5 leaflets, they can be planted.
That is to say, the newly sprouted branches should be selected in early spring, cut with a sharp knife and a little wood on the stem, and then inserted into cutting bed or small basin after being treated with growth hormone.
In this method, from June to September, select the first withered branches of rose flower, cut off the flower stalk, flatten the lower part, take 2-3 nodes as a section, cut off the lower leaf, then cut off the unhealthy and tender leaves, and insert them into the bed under the same conditions of the above method after being treated with growth stimulant.
It is to cut the annual full branches before overwintering, with 2-3 nodes as a section, every 10 branches into a bundle, dig a 30cm pit in the low-temperature greenhouse, and bury the cuttings in the wet sand, with the top covered with soil of 5-10cm (keep dry). In the early spring of the second year, insert the cuttings into the cuttings.
Select the semi lignified branch or hard branch with 1-2 leaves, level the base with a sharp knife, insert it into a water container, immerse the branch in the water for 1 /2, place it at 15 ℃ - 20 ℃ where the sun can be seen, and make it grow roots. During the root promotion, the water in the container should be changed every 2-3 days. When the epidermis of the new root on the branch becomes light yellow or light brown, it can be taken out and carefully planted in the nutrition bag for cultivation.
Every 5-9 days, select full bud eyes on the parent plant of the improved variety to cut, connect 1-2 buds on the stock of white Begonia or rose, or connect one bud on a long branch of the stock every 8-10cm, after the connection, cut the branch with one living bud in sections, and insert it into the sand bed or container like the general cutting method.
In the spring of each year, cutting, tongue and abdomen can be used to connect the improved branches to the rootstock of rose and Begonia.
During the dormancy period of winter and spring roses, the scion will be tied on a root of rose or white Begonia indoors, and then it will be planted in the bottom and medium temperature greenhouse to keep moist. After the interface is healed, it will be potted or planted.
In the growth period of rose, the buds of rose branches are cut, bent and buried in the moist soil, and the first part of the branches protrudes out of the soil surface. When the cut buried in the soil grows new roots, it can be cut and planted.
On the rose branch, select a suitable part, cut the branch or peel the epidermis around 1-1.5cm, wrap the soil ball with bamboo tube or plastic cloth with a diameter of 6-8cm at the peeling place, and keep it moist frequently. After about 1 month, the wound grows new roots, cut it, and planted in the seedbed or flowerpot.
Generally, the rose can be planted deep or the root can be cultivated to promote the new root of each branch stem. Combined with basin changing, the lateral branches of the long new roots can be cut into a new plant.
