Pruning and modeling of Dahlia bonsai: The pruning of Dahlia bonsai should be flexibly mastered according to the variety. Generally, large varieties use single shaping, and medium varieties use four shaping. The unique plastic surgery is to keep the terminal bud, remove all the fu-organ buds, concentrate nutrition, and form a unique dahlia with low plants and big flowers. This dahlia is a potted plant with four stems and four flowers. It is made by removing the core from the seedling and keeping two bases to form four lateral branches with terminal buds on each side. When the height of seedlings is 10 ~ 12 cm, leave two nodes for topping, and cultivate 6 ~ 8 shoots in each pot. The last topping should be carried out 40 ~ 50 days before the Spring Festival to control flowering during the Spring Festival. Flowers should be picked in time after withering to reduce nutrient consumption and avoid the influence of residual flowers on stem and leaf growth. It can also promote the formation of new flower branches and prolong the time of flower viewing.

Watering should be strictly controlled during the growth process to prevent the stems and leaves from growing white and promote the thick stems and large flowers. When it is hot in summer, spray more water on the leaves, which is beneficial to the growth of stems and leaves, but the pot soil should not be too wet. When plants wither slightly before frost, cut off stems and leaves, put them in a semi-shady place, dig out roots a few days later and store them in indoor sand.