Jasmine is native to subtropical regions. It has plenty of sexuality and a hot and humid climate. It is most suitable for the growth of jasmine at 25 ℃ -35 ℃. Jasmine is afraid of low temperature. Once frosted, the leaves will frostbite and fall off. At -2 ° C to -3 ° C, the branches are in danger of being frost damaged. It is necessary to move the potted flowers into the room for winter. The key points of its winter management are:
First, control room temperature. In the northern region, jasmine is moved indoors and placed in a sunny room every year before the cold dew festival. The room temperature throughout the winter, the lowest temperature at night is most suitable for 12 ℃ -14 ℃, the highest temperature during the day is most suitable for 18 ℃ -20 ℃. Attention should be paid to proper ventilation, otherwise it will easily cause the leaves to fall off and rotten roots. Generally, windows should be opened slightly at noon on a sunny day for ventilation.
Second, the right amount of watering. Whether potted jasmine grows well or not, watering is the key. Winter jasmine has entered a semi-dormant state, the amount of absorbed and evaporated water is small, watering should be restrained. If watering is excessive, it will often cause rotten roots, and the leaves will be yellowed, and the fallen leaves will die. However, the watering should not be too small. Generally, it is watered once when the potting soil is dry, so it is appropriate to keep the potting soil slightly moist.
Third, stop fertilizing. Northern winter temperatures are low, and jasmine is in a semi-dormant state in winter. Fertilization should be stopped. Fertilization usually stops from October. Fourth, control pests. Poor indoor ventilation in winter, prone to red spiders and scale insects, harming the young shoots and leaves on the top, affecting growth and ornamental, 1500 times-2000 times the "1059" medicinal solution is usually sprayed on the leaves or the entire plant. Usually pay attention to observe the occurrence of diseases and insect pests, and symptomatic treatment.
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