The breeding of Songxuemei can be carried out in spring and autumn. Cutting, high-altitude stripping, sowing and other methods can be used. In spring and autumn, the mother plant of Pinus sylvestris var.mongolica. Pinus sylvestris var. mongolica is used for cutting. The cutting surfaces are inclined, and the sharp stems or stems are 0.2-0.3mm thick and 40-50mm high, with 2-4 stems and 2-4 cutting surfaces.

The cutting depth is 15-25 mm, and after cutting, 50%-70% indole tincture acid dipping stick is inserted into the culture soil, and the culture soil formula is 68%-72%: perlite 14- 16%: vermiculite14-/kloc.

Keep the seedling soil moist. The cultivated soil is filled with holes and pots, and then put into a temperature shed. The greenhouse is sheltered by 60-70% sunshade net, and the indoor humidity is kept at 30-50%. Keep the indoor temperature at 20 ~ 25℃, take root for 45 ~ 60 days, and transplant into potted plants, one for each pot.

Extended data:

The growing environment of Song Dynasty:

I like a cool, humid and sunny environment. The cold tolerance of red plum is not very strong, and the temperature should be kept above-1℃ in winter. Songhongmei has low requirements on soil, but it grows best in slightly acidic soil rich in humus, loose and fertile, and well drained. Its optimum growth temperature is 18℃ ~ 25℃, and it is afraid of high temperature and scorching sun exposure in summer.

Prune carefully after flowering every year to shorten the crown, keep the beautiful shape of the tree and promote the germination of newly-opened branches. When pruning, it should be noted that except some branches that affect the plant type, all other branches cannot be cut off. Generally speaking, you can cut off half or two-thirds of the branches. Because on the mature lignified branches of pine and red plum, if they are pruned too much, there will be no viable buds.

Baidu Encyclopedia-Song Xuemei