Pruning of several common flower shrubs in the north

1. Yellow Thorn Rose, Rosaceae Rose. The clumps are 1.5-2.5 meters high and the branches grow upright. The flowers are solitary in the leaves, with several flowers per branch, yellow, double petals, and flowering periods from May to June. In the first few years after planting, the branches after flowering should be shortened, which will lead to the formation of more new techniques to increase the number of flowering sites in the coming year. Perennial old forests should be properly sheared with dense inner Litchi, otherwise dense clusters will hinder the differentiation of flower buds, and powdery mildew is also prone to occur.

2. Paste Begonia, Rosaceae Papaya. Plant height 1-2 meters, main branch upright, lateral branches extending outward. Flowers pink or red, born between leaves of biennial branches, flowering from April to May. In the sapling stage, the short flowering branch is waited for after flowering, which promotes the germination of some lateral branches, which can form the tree body as soon as possible, and can also increase the flowering position in the third year. In order to make the tree structured, it is also possible to retain only 3 main branches after planting the seedlings, cut the excess branches from the base, and allow the lateral branches to branch out from the top of the 3 main branches so that the low shrubs can be maintained. The shape of the tree can prevent the branches from becoming too dense.

3. Hibiscus, Malvaceae is a genus. Plant height 3-6 meters. The flowers are larger and are solitary in the leaves of the two-year-old branches. They are red, white, and purple, and are flowering from May to October. Wood rakes are generally pruned into small trees, and a main branch should be kept when planting, cutting off the remaining twigs. The trunk should not be left too high. Let the side branches grow from around 30 percent. Leave 5-8 side branches per plant while retaining a central dominant branch. At this time, the branches will all rise upright and tightly together to expand the crown span. The collaterals should be short-cut each year in the early spring to encourage axillary buds to sprout and form more new collaterals. With the increase in the number of internal litchi, the lateral main branch also opens outwards, and the number of flowering will increase year after year.

4. Lagerstroemia, Lysimachia Lagerstroemia. Plant height 3-6 meters. The buds are planted on the top of annual branches, red or purple, and flowering from July to September. Similar to hibiscus, the crape myrtle planted in the garden should be made into small trees. After the planting, retain a section of trunk about 40 centimeters, and then cut it short. Develop three lateral branches to form a natural happy shape and do not form a central leadership branch. This is because the crape myrtle blooms in the middle of the summer and has a long flowering period. If the central leadership branch is preserved, dense inflorescences and lush foliage are intertwined, which is detrimental to ventilation and light transmission, and can easily cause diseases. Lagerstroemia is differentiated and budded from the top of annual branches. Therefore, do not short-cut and pick them up. In order to promote the formation of some flowering branches, the two-year-old branches should be shortened and new branches should be increased.

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