(1) Potting

Hawthorn can be potted before leaves sprout in spring or after leaves fall in autumn. Autumn potting is better. Use a rectangular or oval purple sand basin as a matching basin, or a plain-fired basin. The potting soil needs to be moderately fertile and should not be too fertile. The soil pH value is 6-7.5 and should not be too alkaline. The soil can be mixed with garden soil and a small amount of decomposed manure.

(2) Shape

First understand the physiological characteristics of hawthorn. Hawthorn flower bud differentiation begins around July and reaches its peak in mid-August. During this process, the new shoots of the entire plant stop growing to avoid competing for nutrients with the flower buds, so it is easier to form flowers. Generally speaking, if the nutritional conditions are sufficient, the long, medium, short branches and even leaf clusters of hawthorn can form flower buds. Hawthorn flowers can be parthenocarpic without fertilization and have a high fruit setting rate. The physiological fruit drop period is concentrated in 2-4 weeks after flowering.

Second plastic trimming. Hawthorn saplings have strong top dominance and fewer side branches. Therefore, when young trees are young, they should be pruned frequently to promote more branches, and the tree body can be girded or girded during the flower bud differentiation period from mid-July to early August to promote flower bud differentiation. The plant shape of hawthorn bonsai can be created and cultivated by both cutting and pinning. Hawthorn branches are brittle, so be careful when processing them. Generally, metal wire tying is used. When pruning during the summer growth period, pay attention to the proportion of vegetative branches and fruiting branches to ensure the results for the next year, and pay attention to thinning out overly dense flowers and fruits.

3. Maintenance and management

(1) Location

Hawthorn is a light-loving tree species. Insufficient sunlight will cause thin branches, thin leaves, light color, and poor fruit setting. . Therefore, it should be maintained and managed in a place with sufficient sunlight and good air circulation.

(2) Watering

Hawthorn is more drought-tolerant, and non-fruiting trees do not have strict water requirements, but fruiting bonsai must ensure an adequate supply of water. The pot should be kept moist and should not accumulate water. In autumn, the amount of watering should be controlled, and in winter, it should be dry rather than wet.

(3) Fertilization

Hawthorn is resistant to infertility and does not particularly like fertilizer. Apply base fertilizer once in winter, but not too much to avoid excessive growth. Apply a thin layer of phosphorus and potassium fertilizer once after flowering. Nitrogen fertilizer is not suitable. Fertilize appropriately in autumn.

(4) Preserve flowers and fruits

During the blooming period, strong branches of strong trees can be girded and sprayed with 30PPM of gibberellin to increase the fruit setting rate.

(5) Pest and disease control

Pay attention to the prevention and control of common powdery mildew, red spider mites and aphids.