Bonsai is an artwork that depicts natural landscapes in pots. It is developed on the basis of potted plants and stone appreciation. Bonsai is a clever combination of plant cultivation technology and modeling technology. It is a kind of display that uses plants, rocks and other materials, processed artistically, planted or arranged in pots to imitate the beautiful scenery of nature. It is the crystallization of the art of cultivation technology and modeling technology, and also a combination of natural beauty and artistic beauty.

  Rose, known as the queen of flowers, is also known as Yueyuehong, Changchunhua, Shengchun, Shouke, Douxuehong, etc. It is a plant of the genus Rosa in the Rosaceae family. According to the definition of the American Rose Society in 1966, the variety group after the first hybrid tea rose (la France) appeared in 1867 is called modern rose, and the varieties before 1867 are collectively called ancient roses. Most of the roses used in garden production and cut flower applications are modern roses. The Science and Technology Group of the Rose Society has corrected the name of "rose", that is, "rose" refers to modern roses in general.

  Rose is an evergreen or semi-evergreen low shrub with red and occasionally white flowers. It can be used as an ornamental plant or a medicinal plant. The natural flowering period of rose is from May to November. The flowers are large and fragrant, and are widely used in gardening and cut flowers. The main types of roses are cut roses, edible roses, climbing roses, ground cover roses, etc. Roses have an indispensable value in gardening and greening. Roses are the most used flowers in gardens in the north and south. They have a long flowering period, high ornamental value, and low price, and are loved by gardens everywhere.

  The current cultivation process of rose bonsai requires regular fertilization. Too much or too little fertilization will have an adverse effect on the growth of the rose. The amount of fertilization is difficult to control, and there are too many artificial traces. The cultivation process of using roots instead of trunks is not easy to control and coordinate, and the nutrient supply is not easy to concentrate. It is also difficult to cultivate bonsai of different cloud-like styles.

  1) Prepare fertilizer water, add decomposed fertilizer to the air-dried water to prepare fertilizer water; the weight ratio of air-dried water to decomposed fertilizer is 100:0.8; adding fertilizer to water can apply fertilizer at the same time when watering the rose, eliminating the step of applying fertilizer separately. At the same time, because the fertilizer is evenly dissolved in the water, it also avoids uneven distribution of nutrients in the plant due to uneven application of fertilizer. In addition, because the fertilizer water is prepared in advance according to a certain amount, it also avoids the adverse effects on the growth of the plant due to excessive or insufficient fertilization;

  2) Prepare the culture soil: prepare humus, garden soil and sandy soil in a ratio of 2:1.2:1.2; the sandy soil has strong permeability, good ventilation, fast decomposition of organic matter, long arable period and easy seedling establishment;

  3) Select seedlings: Choose miniature roses as the seedlings to be cultivated; miniature roses have bright colors, small leaves, are resistant to pruning, have short internodes, and have a high germination rate;

  4) Initial cultivation of roses: the rose seedlings selected in step 3) are initially cultivated; in the initial stage of cultivating the seedlings, they should not be exposed to direct sunlight, should be shaded, and thin fertilizers should be frequently applied; the thin fertilizer frequently applied means that the fertilizer water prepared in step 1) is used each time the seedlings are watered, and fertilizers are also added to the plants; after the initial cultivation of the rose seedlings, the branches should sprout at least twice; when the branches sprout, the sprouts should be preliminarily pruned;

  5) Rose rejuvenation cultivation: Step 4) Rose seedlings that have been initially cultivated are then transplanted for rejuvenation cultivation for 3 years to increase the thickness of the roots and prepare for future root lifting. During the transplanting process, the roots need to be straightened so that the roots only grow downward and limit the outward extension of the roots. During the rejuvenation cultivation process, thin fertilizers should be frequently applied, that is, the seedling piles should be infused with the fertilizer water prepared in step 1) to make the seedling piles grow rapidly. At the same time, the seedling piles should also be pruned. When the tender buds grow into branches and the light they receive affects each other and causes them to fail to grow normally, the branches with poor growth conditions are removed. Unnecessary branches can also be removed or shortened according to the needs of bonsai production.

  6) Root lifting: After the rejuvenation cultivation in step 5), the root system of the rose plant has grown well and thickened. In mid-April, remove the soil of about 85% of the total length of the main root at one time, leaving about 15% of the total length of the main root exposed;

  7) Cultivate in shallow pots with roots instead of trunks: Transplant the rose plants that have been rooted out in step 6) into shallow pots for cultivation with roots instead of trunks. In the shallow pots, cut off the dead flowers in time after the first flowering of the rose plants. At this time, the small roots on the main roots have died, showing the bonsai shape of roots instead of trunks. Buds will also appear on the main roots. Select the useful buds and remove the useless ones. After 4 months of cultivation in shallow pots, through the continuous trimming of lateral buds and branches during the cultivation process, the cloud-like shape of the rose branches has been formed, the main roots are cracked and thickened, and the mottled phosphorus flakes on the trunk make the whole stump look very old. The buds, leaves, tips, branches, trunks, and roots have been coordinated, and the overall cultivation is completed.

  Among them, during the cultivation process of steps 4)-7), the young shoots should be pruned in time. The young shoots left are those whose growth direction is perpendicular to the growth direction of the branches, and the other young shoots are removed; at the same time, the side branches and the main trunk should also be trimmed by hooking, pulling, pruning and other methods; in winter, the rose plants should be placed in a winter shed for cultivation.

  In this embodiment, the drying of the water in step 1) is to place the water under sunlight to increase the water temperature and microbial components.

  In this embodiment, the decomposed fertilizer is a fertilizer formed by retting, fermenting and decomposing manure and cake fertilizer.

  In this embodiment, the cake fertilizer is soybean cake, rapeseed cake, cottonseed cake, or sesame cake.

  In this embodiment, the garden soil in step 2) is soil from a flower garden, vegetable garden or orchard.

  In this embodiment, the humus soil in step 2) is made by adding fertilizer water to crushed weeds, tree branches and leaves, etc., and then sifting the soil after natural fermentation.

  In this embodiment, the miniature rose described in step 3) is a rose with a flower diameter less than 50 mm.

  In this embodiment, the cultivation in step 4) is carried out in a stick tube; the stick tube can restrict the outward development of the roots and make the roots grow downward, preparing for the subsequent root lifting.

  In this embodiment, the cultivation in step 4) is carried out by cuttings from old branches.

  In this embodiment, the old branch cutting process is: in early spring, select full and strong rose branches, cut them into small branches, each branch contains 4-8 buds, flatten them with a sharp knife at the lower end, insert them into the soil, so that the branches exposed above the soil contain at least 2 buds, water them after cutting, pay attention to shading, and place them in a winter shed for winter cultivation; the soil is the culture soil prepared in the above step 2), and the water is the fertilizer water prepared in the above step 1); old branch cuttings can shorten the cultivation time compared with tender bud cuttings.

  In this embodiment, the transplanting in step 5) is transplanting into a tubular pot for cultivation.

  The cultivation method of rose bonsai, the crown of the cultivated rose bonsai is cloud-shaped, with roots instead of trunks, and the cracked branches appear very old, while at the same time reflecting a style of old trees with new flowers; in the cultivation process, no aluminum wire climbing is used, and the main methods are hooking, pulling, and pruning, which effectively avoids the phenomenon of too many artificial traces; it also solves the problems of difficult to control the amount of fertilizer and uneven fertilization; and the rose bonsai can be appreciated in different appearances throughout the year, that is, viewing the teeth in spring, viewing the flowers in summer and autumn, and viewing the cold branches in winter.