In Northeast China, North China and Northwest China, the absolute temperature in winter is low and lasts for a long time. Osmanthus fragrans in pots often suffers from freezing injury, which limits its popularization. According to many years of experience, the author talks about the conservation of Osmanthus fragrans in winter in northern China. In a nutshell, it is: â€œIn autumn, winter is not frozen, and Spring Festival Gale is outâ€. "Autumn inaccessible" means that entering the room should be late or not. Although sweet-scented osmanthus was born in subtropical regions of China, it is still relatively cold-tolerant to other evergreen broad-leaved species. At the turn of autumn and winter, the temperature gradually decreased, and osmanthus can gradually adapt to the low temperature environment. Early burglary, Osmanthus's own cold-resistant potential has not been fully exerted. Under normal circumstances, the temperature of the cold spell at the turn of autumn and winter will not be very large. Osmanthus after several exercises, as long as the temperature is not lower than -1Â°C, there will be no problem in the open air for 4 to 5 days. Even if the temperature drops to -2Â°C to -3Â°C, sweet-scented osmanthus will not be frozen for a short time. After low-temperature exercise, the ability of sweet-scented osmanthus will significantly increase, winter dormancy is sufficient, and flourishing in the coming year. "Frost in winter" means that osmanthus should be protected from frost damage as much as possible. The northern winter conservation can take the following measures: First, put the potted osmanthus directly in the greenhouse, the temperature is not higher than 3 Â°C, and promote it to sleep. Care should be taken when placing: Let osmanthus maximize exposure to sunlight. If it is not in direct sunlight, place it in a place where light is strong enough to allow it to receive scattered light. It is best not to put sweet-scented osmanthus in the shade of light, otherwise it will cause a lot of fallen leaves. The osmanthus should be placed in a relatively stable place in the air, and should not be placed in the doorway, aisles, and other air circulation areas to prevent it from being harmed by cold air. Do not put sweet-scented osmanthus next to the stove. The reason is that the temperature at the time of the fire around the stove is high and the temperature during fire extinguishing is reduced. It is not good for osmanthus dormancy. In addition, there will be a lot of dust on the osmanthus leaves, seriously affecting photosynthesis. Do not put smoke where it can be smoked, and not burn it to warm the sweet-scented osmanthus. Otherwise, not only can the osmanthus not sleep well, but it will also cause great damage to its normal physiology. The second is to create a semi-submerged small greenhouse: Select the leeward sunny place in the courtyard and make a greenhouse according to your needs. At present, many of the sweet-scented osmanthus trees that have been preserved in the northern regions for a century or so are used in many ways. Specific approach: Divide the width and depth of suitable trenches on both sides of the east-west direction, then dig into the ladder from both sides to the center according to the size of the flower pot, and the minimum is the aisle. Set up herringbone in the upper part, 60 cm above the ground. The roof in North China can be covered with a layer of plastic film. If it is in the northeast or northwestern region, it can be divided into two layers, both inside and outside, with a 15 cm spacing and sealed with soil and compacted around to prevent it from being blown by the wind. If the weather is particularly cold, cover the plastic film with straws. A small door is opened on the east side. When the temperature is too high, ventilation and heat dissipation can be turned on to keep the basement temperature below 5Â°C. Use of underground greenhouses, spring should be timely withdrawal of plastic film, not because of the high temperature and osmanthus in advance to branching and leaf development, but not too early, so that sweet-scented osmanthus frozen. The third is bagging. Bagging should not be premature, and the minimum temperature should reach -5Â°C to start bagging. It is best to use a thick transparent plastic film, according to the crown width and height of the osmanthus flower, make a rectangular bag, put the flowers and pots into it, and put the bag mouth upwards. Pot holders (with bamboo, wooden sticks, branches, etc.) make the bag not cling to the leaves so that the leaves do not freeze. When there is no wind and warm weather, the bag mouth can be unlocked to allow the sweet-scented osmanthus to receive the sun, ventilation and ventilation. After the spring, as the temperature rises, the bag mouth can be gradually opened to adapt the osmanthus to the outside environment. When the temperature is stable at around 5Â°C, the bag can be removed. Pay attention to the dry winds in spring. When it comes to strong cold currents, keep them warm at any time. After the Ching Ming period, the temperature gradually stabilized and it can be completely bagged. "Spring Festival Evening Out" means that the sweet-scented osmanthus out of the room should not be earlier. Because of the indoor temperature, humidity, air, light and exposure to different places, indoor osmanthus, especially the southern variety or plants that have been pumped due to excessive temperature, the branches are soft and delicate. If you move out of the house directly, it can easily lead to wilting. Therefore, osmanthus should be exercised before going out of the room. In April, the weather was obviously warmer, and the osmanthus in the room had to be moved outside. In order to adapt itself to the outdoor environment, open doors and windows at noon every day before leaving the room to allow the air to circulate and allow the sweet-scented osmanthus to savor the sun. Three or five days before leaving the room, you can extend the opening hours of doors and windows. General arrangements for the room after the Ching Ming. Avoid placed in the outlet, because the sweet-scented osmanthus buds in the room has not yet lignified, severe branches broken, resulting in a large number of fallen leaves, light branches are delicate, affect the summer flower bud differentiation, resulting in osmanthus flowers. In the early days, it is best to move out of the room during the day and back into the room at night to return for a few days, so that osmanthus gradually adapt to the external environment, and then placed outside.
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