How to raise orchids in summer

Summer is a hot season in a year, and there are often sultry weather around 35℃. Climate change is short-lived. High temperature season is an eventful autumn for potted orchids. A little negligence in daily management may cause unexpected harm, and orchid growers must be cautious.

First, strengthen ventilation, heatstroke prevention and cooling, high temperature and sultry is the enemy of orchid cultivation. Closed blue rooms generally have push-pull aluminum alloy glass windows, which can be opened and closed freely. As long as there is a temperature difference between the inside and outside of the blue room, the opening degree of the sliding window can be used to control convection and natural ventilation. If the temperature difference is too small and there is no wind, you can use a ventilator and a miniature electric fan to blow with a breeze to promote air circulation. When the temperature exceeds 35℃, it can be cooled by water curtain or air conditioner if conditions permit; If the conditions are limited, you can often sprinkle water on the ground to cool down.

The second is to create humidity according to local conditions, and should avoid being too dry or too wet. In summer, the temperature is high, the water evaporates quickly, and the air humidity is low. We must strive to create a small environment suitable for orchid growth. Generally, the water tank can be used for humidification to improve the air humidity. The sink is best set with the blue shelf. Each floor of the blue shelf should be equipped with a sink, and the low end of the sink should be equipped with a sewage switch to facilitate the irregular discharge of sewage. The depth of the sink is generally 20 cm to 30 cm. It is filled with water, covered with steel wire mesh, and the basin sits on it, which not only increases the air humidity, but also has a certain cooling effect. Combined with ground water spraying, the humidity in sunny days can reach about 40%, which can basically meet the humidity requirements of orchids. If it is cloudy and the air humidity in the blue room is too high, it is necessary to turn on the ventilator and miniature electric fan in time and blow with breeze to promote air circulation and reduce air humidity. In summer, we should flexibly master the watering time and times according to the situation of using pots and planting materials. Generally speaking, it is best to water at night and in the morning. Generally, do not use the method of soaking basin to spray water, and spray water as little as possible to avoid pouring water on the leaves and causing rot.

Third, pay attention to getting wet in the rain, strengthen the blue house and actively guard against typhoons and rainstorms. Summer is the rainy season. In areas with good air quality, orchids can get wet properly in the rainy season. Where air pollution is serious, there are many acid rains, which make orchids damp and easily lead to various diseases, which should be resolutely put an end to. In places with good air quality, the most suitable places for orchids to get wet are long-lasting wind and Mao Mao rain. After a storm comes a calm, orchids are particularly energetic and grow rapidly. Orchids are most afraid of "solar rain" and sudden heavy rain in high temperature season. In case of "sun rain", Yilan people should water orchids in time to make the summer heat in the basin disappear, and strengthen ventilation to dry the water in the leaves of new seedlings as soon as possible. In addition, it is necessary to strengthen the orchid room and pay attention to the weather forecast at any time. In case of extreme weather such as typhoon, measures should be taken quickly in advance to shelter orchids from wind and rain and avoid orchids from being hurt.

The fourth is to skillfully apply orchid fertilizer to promote growth. Summer is the peak season for orchid growth, and topdressing is necessary, but it needs to be mastered flexibly according to the temperature change. Fertilization is mainly based on top dressing orchids in early summer, and it is appropriate to apply organic fertilizer to the roots, but it needs to be applied thinly, fertilized at night and watered with "rejuvenation water" the next morning. It can also be topdressing outside the roots, applying inorganic fertilizer and spraying one thousandth of urea and one thousandth of potassium dihydrogen phosphate. In order to prevent fertilizer damage, the leaves should be washed with water the next morning, and biological bacterial fertilizers can also be sprayed, such as promoting root growth, whole plant, orchid king, Xishuo and Gaocui. Organic fertilizer, inorganic fertilizer and biological fertilizer should be used alternately once a week. From summer to the future, it is forbidden to apply organic fertilizer or inorganic fertilizer to the roots, and foliar fertilizer is better. One thousandth of urea and one thousandth of potassium dihydrogen phosphate or biological bacterial fertilizer can be used alternately to supplement nutrition and promote the vigorous growth of orchids.

Fifth, the prevention should focus on diligent cleaning and do a good job in the prevention of blue disease. The high temperature season is also the season with frequent diseases and insect pests of orchids. In daily management, based on the principle of putting prevention first and combining prevention with control, the occurrence of pests and diseases should be avoided as much as possible. Usually, we should pay attention to the cleanliness of the orchid room, remove all kinds of dirt in the orchid cultivation place in time, clean up the ground and the orchid rack, and often disinfect it with lime water. In high temperature and high humidity environment, orchids are easy to breed scale insects and thrips. These pests will invade orchid leaves and should be killed with drugs in time. Soft rot and stem rot are the enemies of orchids in summer. Once this disease is found, we should act decisively, turn over the pots immediately, and cut off the diseased seedlings and neighboring seedlings without hesitation. We must not take chances and delay the timing of control.