Hibiscus is an important flowering shrub in summer and autumn. In the south, it is mostly used as flower hedges and hedges, and in the north, it is mostly used as garden decorations and indoor potted plants. Hibiscus has strong resistance to harmful gases such as sulfur dioxide and chloride, and also has strong dust retention function, which is the main greening tree species in polluted factories. ?

The flowers are blooming. Hibiscus has a long flowering period, starting from May and opening to 65438+ 10. But as far as a flower is concerned, it opens in the morning and withers the next day. Therefore, it is advisable to pick flowers for vegetables every morning. If it is processed and dried, it should be picked in a sunny morning and dried immediately.

Hibiscus is mainly distributed in tropical and subtropical regions. Hibiscus originated from the African continent, and there are many kinds of African Hibiscus, showing rich genetic diversity. Originated in the central provinces of China, it has been cultivated in Taiwan Province, Fujian, Yunnan, Guizhou, Sichuan, Hunan, Henan, Shaanxi and other provinces in China.

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Newly planted hibiscus plants are small, so they can be allowed to grow or lightly pruned in the first 1-2 years, that is, pruning dead branches, weak branches of diseases and pests and declining branches in autumn and winter. When the trees grow up, hibiscus plants should be pruned. Plastic pruning should be carried out after falling leaves in autumn. According to the different degree of opening of hibiscus branches, it can be divided into upright type and open type.

Erect hibiscus branches have small incident angle, nearly erect, strong germination ability, relatively poor branching ability and are not tolerant to long-term growth. It can be cultivated and transformed into a tree with non-layered trunk, with 3-4 main branches left on the trunk and the rest sparse, and each main branch can leave 1-2 side branches, which is called the trunk happy shape.

Pruning method of vertical hibiscus: reasonably select and keep the main branches and side branches, and remove the redundant main branches and side branches in batches to make the distribution of main branches and side branches reasonable and the density moderate; For the main branches and side branches to contract again, the angle of new branches should be large, the direction should be positive, and the over-dense peripheral branches should be reasonably thinned to facilitate ventilation and light transmission.