Prevent stuffy steam before spring

Since winter, the lowest temperature encountered is minus 3 to 4 degrees at night a few days after the winter solstice. Under the attack of the cold current, the river flowing through the Urban area was coated with thin ice. All the outdoor sides of the orchids were sealed tightly against the cold of the night. The indoor side is all open, allowing the indoor temperature to be transmitted to the orchid garden, so that the night temperature in the orchid garden is about three degrees higher than that outside.

There will be a short warm up period after the cold snap. The warm season is southerly, and southerly winds bring moist air. Under the action of the south wind, the temperature of the orchid garden will rise quickly during the day by sunlight. At this point, carefully observe the orchid basin, you will find that the basin wall is full of moisture, often with fine water droplets, this phenomenon is also called sweating. Blue basin sweating means that in the case of high indoor temperature and humidity, the ventilation in the orchid garden is not ideal enough, so it is necessary to increase the ventilation flow immediately, otherwise the orchid root will be steamed.

The so-called steamed, that is, in the case of air circulation, sunshine and humidity at the same time, the temperature in the orchid basin will rise rapidly, but can not discharge heat in time, the reverse osmosis of water vapor in the basin and the water vapor in the air act together around the basin wall, more hindered the hot air in the basin, at this time the orchid root in the basin will feel oxygen deficiency.

Once steamed, langen is prone to disease. It is mainly reflected in the black spots or shrinking heads on the cotyledons of the second year, which is the reason for steaming in the greenhouse. Once there is this disease, that is, after another year will also have spots, even if the appropriate training care, it will take four or five years to recover. As the saying goes, it is easy to get sick and difficult to get rid of it. Orchid friends often have trouble finding the cause of black spots and shrinking heads on orchid leaves, often thinking it is improper watering or invasion of germs, but ignoring the factor of steaming. Therefore, it is necessary to pay attention to ventilation in winter, and must not ignore ventilation as the first element in order to pursue increased indoor temperature.

Winter ventilation should pay attention to methods. If you want to open the window for ventilation, it is best to open the upper window of the orchid frame or the window that is a little farther away from the orchid frame, so that cold air can enter from a little distance, so that the cold air is not easy to blow directly on the orchid leaves, and fresh air can be exchanged. Winter, orchid grass most afraid of string hall wind, also called thief wind, please do not ignore.