(1) Begonia flowers can be watered once in early spring when combined with fertilization, and should be watered again when the fruit is dry after flowering. Pay attention to the prevention and control of aphids, scarabs and other pests and rot diseases, and it is best to spray lime-sulfur mixture in early spring for prevention and control.

(2) Potted begonia flowers should be applied thinly and frequently, otherwise too much fertilization will easily damage the root system and the leaves will die.

Shaping and pruning method of begonia flower cultivation

Plastic pruning is mainly to improve the lighting conditions inside the crown, thus forming a beautiful tree shape and improving the ornamental value. Generally, it should be pruned once after defoliation and before germination in early spring to cut off dead branches, diseases and insect pests and weak branches, so as to keep the canopy evacuated, ventilated and transparent. In order to promote the vigorous flowering of plants, long branches should be shortened to reduce the nutrient consumption of germination, so that axillary buds can obtain more nutrients and form more flowering and fruiting branches. Fruiting branches and intermediate branches do not need pruning. In the growing period, if the heart can be picked in time, the vegetative growth can be limited in the early stage, and the effect will be more obvious, especially the potted landscape should be controlled in this way. If the plants are pruned into shrubs, the height can be maintained at 20 ~ 30cm in the first year, and the branches will gradually increase after 2 ~ 3 years. In the fourth year, the height will be maintained at 65,438+0 ~ 65,438+0.5m, and they will be pruned again at the empty crown or weak branches to make them grow strong branches. If the crown is shaped, it can be trimmed a little.

Method for adjusting flowering period of begonia flower cultivation

Begonia usually blooms only once in spring. If measures such as cooling, reducing water and shading are taken, it can bloom again in the autumn of that year. That is, at the beginning of July, potted begonia flowers were moved to the shade to cool down, reduce light and control watering to maintain life and not sprout new buds. In this way, after 35-45 days of dormancy, put the plant in full light, water and topdressing liquid fertilizer to sprout new buds, and after 5-7 days, you can see bright begonia flowers. In addition, taking advantage of its temperature-sensitive habit, the potted begonia can be moved to the sunny place of the greenhouse in the middle of winter by heating, watered and topdressing, and then sprayed with water every day on the branches of the plant, keeping the temperature at 20 ~ 25℃, and it can bloom after 30 ~ 40 days, which can be enjoyed on New Year's Day or Spring Festival.

Propagation method of begonia flower culture

Begonia flowers are propagated mainly by sowing or grafting, or by dividing plants, layering and cutting roots, but the seedlings propagated by seeds grow slowly, and it takes about 10 years to bloom. Grafting seedlings can bloom early and maintain their original excellent characteristics, so grafting is generally used for propagation.

(1) sowing and propagation

Most of them are used for flower breeding or root cultivation, such as Vitex negundo, Begonia Xifu, Begonia Schizonepeta and Begonia, and there are also Begonia Hubei in the south. After stratification sand storage treatment and before sowing, low temperature stratification germination treatment for 30 ~ 100 days can improve the emergence rate, and the emergence is rapid and orderly.

(2) Grafting propagation

It is the most commonly used method for begonia reproduction. Rootstocks can be planted and propagated by means of seedling raising, branch grafting and bud grafting. Branch grafting can be carried out by cutting and splitting before germination in spring, and bud grafting can be carried out in July-September in autumn, and the specific time can be carried out according to the local climate. The scion selects fully developed 1 year branches and takes the middle section (with more than two complete buds); Bud grafting is often t-shaped.

In addition, planting, layering and root cutting can all be carried out in spring.