Prevention of freezing injury: low temperature and frosty weather in winter may pose a serious threat to flowers and trees. In order to make flowers and trees overwinter safely, we must first abide by the principle of "no winter and no spring". "Winter does not enter": When the weather is just cold and there is no frost, for most flowers, don't rush to move indoors. "Spring never comes out": When the weather gets warmer, don't move out in a hurry. Wait until the last night of spring is frosty and the weather is completely better. After moving out, if you encounter late frost or windy weather, you still have to move back indoors. Secondly, according to the different tolerance of different flowers and trees to low temperature, different cold-proof and warm-keeping measures are taken, or flowers and trees are directly moved indoors, or flowerpots are covered with plastic films, or flowers and trees can be directly covered with plastic bags, and simple greenhouses can be temporarily built for heat preservation. Flowers and trees with strict light requirements should be placed in indoor windowsills or sunny places near windowsills; Those who are not strict with light or are shade-tolerant can be placed in a cool and dark place, but pay attention to ventilation. It is advisable to open the window for ventilation at noon on sunny days, but don't let the cold wind blow the flowers and trees directly.

Careful fertilization: flowers and trees in dormancy or semi-dormancy should stop fertilizing to avoid root rot, and only fertilize when changing pots in spring; Flowers bloom in autumn and winter or early spring, and flowers and trees sown in autumn should be applied with thin fertilizer. In order to improve the cold resistance of flowers and trees, fertilization should be reduced at the end of autumn to avoid tender stems and leaves of flowers and trees and reduce their cold resistance. ? 4. Trimming: dead branches, dense branches, diseased branches, old branches and damaged branches can be cut off with sharp knives or benefits; For those that bloom in spring, only the autumn without flower buds should be properly thinned; For the branches that bloomed that year, pruning should be strengthened to promote the development of new shoots and prepare for the next year's flowering; For those who are frozen, but some are still alive, they can be pruned again, and at the same time, the management of fertilizer and water should be strengthened to make flowers and trees grow quickly. ? 5. Pest control: The common disease of flowers and trees in winter is powdery sooty blotch, and the common pests are aphids, whiteflies, mosquito shells and so on. Effective measures should be taken to prevent and control diseases and insect pests in the dormant period, so as to reduce the occurrence of diseases and insect pests in the coming spring? Attachment: What are the main points of winter management of fruiting flowers? With the arrival of winter, a variety of fruiting flowers are also on the market, such as orange-red vermilion orange, golden bergamot, bright medlar and bright winter red fruit. The fruit-bearing period of this kind of fruit-bearing flower is as long as three or four months, and as short as more than two months, which means good luck and prosperity and is very popular among people. The winter maintenance of this flower needs to pay attention to the following points. Temperature: Fruit-hanging flowers can be divided into cold-resistant flowers and non-cold-resistant flowers according to their cold tolerance. Flowers that are not cold-tolerant will grow poorly at low temperature, because their plants are sensitive to low temperature, their stems and leaves turn yellow and dry, their fruits become soft and rotten, and they lose their ornamental value. Therefore, for some cold-tolerant fruiting flowers, the temperature should be kept at about 65438 05℃ at night and 65438 05℃ during the day. In this way, the branches and leaves of plants are tall and straight, and the fruits are full and tender. These flowers include oranges, bergamot, tiger tongue red, Fukiko and so on. Cold-tolerant fruit-bearing flowers, because of their strong resistance to low temperature, usually have nothing to do at around 0℃, and their stems, leaves and fruits will not deteriorate due to freezing, and the requirements for environmental temperature are not strict, such as Lycium barbarum, winter red fruit, pyracantha fortunei, and Ilex spineless. Moisture: Moisture is an important part of fruit. Fruit peels without water will wrinkle, feel soft, and shrink in severe cases. Therefore, only by keeping the fruit with enough water will it appear firm, full and moist. For ordinary flowers, we are dry and watered thoroughly, but for flowers with fruits, the pot soil should be relatively wet, which is especially important for evergreen flowers with fruits. Because the temporary water shortage of plants will lead to their self-protection function, so that the water in the middle of the fruit will be transferred to the stems and leaves for transpiration, thus causing the fruit to be short of water. Plants are short of water, and fruits can be restored after watering. If there is water shortage for a long time, even if watering can restore the stems and leaves, the fruit will still lose its ornamental value. There are also common oranges, which are often forgotten to water, and the leaves of the plants are soft and the oranges are wrinkled. After watering, the oranges are still gradually shriveled, and finally dry and hung on the branches, which is a great waste. For orange plants, we can often spray water on them to improve the humidity around them. Sunlight: Fruit-hanging flowers are best placed in sunny places, and it is best to get sunshine, especially some plants with blue fruits. Because the more anthocyanins in the fruit, the brighter and ruddier the fruit is, and the synthesis of anthocyanins is strengthened under the action of sunlight, making the fruit more ornamental. ? Ventilation: the environment of fruit-bearing flowers should be unobstructed during fruit-bearing period to prevent the fruit from being suffocated and falling off in advance. ? Finally, the fruiting flowers are generally not fertilized in the middle and late fruiting period, and fertilization will make the fruit fall off and shorten the fruiting period. In winter, poor ventilation or high temperature in the environment of fruiting flowers lead to the activity and breeding of some germs and pests. For this phenomenon, common sterilization and pesticides can be used, and attention should be paid to ventilation and proper control of room temperature.