Maintenance points of orchids in summer

With the rise of temperature in summer, all kinds of orchids enter the peak period of growth, so we should do a good job of heat prevention and cooling, fertilizer and water management, pest control and disease control of orchids in summer, so as to make orchids spend the summer safely.

Shade into the summer, whether it is open-field cultivation or indoor orchid cultivation, should cover the strong light. Arbor shade should be set up, such as bamboo curtain, Reed curtain and so on, which should be opened sooner or later to accept the scattered light of dawn and sunset. Semi-open-air orchid cultivation places need all-day astigmatism, and line orchids need 15% of the full-day light. In order to accelerate the growth of orchid sprouts, they can be exposed to low light for 1 hour sooner or later, and it is even more necessary to strengthen shading and heat prevention and cooling in extreme heat. Whether it is the ground or Yangtai, it is advisable to sprinkle water to humidify and cool down frequently in the morning and evening. The place of raising orchid should strengthen ventilation and make sure the air is fresh.

Watering in the peak period of orchid growth, once the lack of water in summer, the orchid growth is poor, orchids need eight points dry, two minutes wet. Watering should be in line with the principle of "dry is poured, wet is stopped, and properly dry". The water must be thoroughly watered, not half of it. The watering times can be determined by the plant material of the orchid. Such as volcanic stone, red brick grains, pumice and other hard hydrophobic plants, can supply water once a day; pine chestnut king, pond mud, humus and other plants with strong water absorption can supply water once in two or three days. Watering is usually carried out in the early morning or evening, and must not be watered and poured at noon. It is better to use clean, pollution-free, slightly acidic water (pH 5.5 / 6.5). Orchids rotten roots, black spots on the leaves, leaf bud rot and other morbid, mostly related to improper water supply.

Generally speaking, the green leaf varieties should apply fertilizer with the balance of nitrogen, phosphorus and potassium, while the line magnolia should only apply phosphorus and potassium fertilizer. In the early summer, liquid fertilizer is applied every 10 to 15 days. When the heat temperature is higher than 30 ℃, all kinds of orchids should stop applying fertilizer. Four seasons orchid stalks unearthed or during flowering should not be fertilized. No matter what kind of organic fertilizer is used, it must be fully fermented and diluted with clean water. The best fertilization time is in the evening, and spray fresh water again in the morning the next day. The leaves are yellow and thin is lack of fertilizer, should be topdressing; black leaf tip scorch is too much fertilizer, should stop fertilization. In summer, 0.1% potassium dihydrogen phosphate is sprayed every 10 days or so for foliar fertilization. within an hour or two, the pot orchid can be watered with clean water to remove the residual fertilizer and prevent it from gathering roots to rot the orchid root.

Pest control: in the summer when Rain Water is abundant and the air humidity is high, the environment of the orchid planting place is too wet and the material in the basin becomes sour, which is easy to breed all kinds of diseases. If black spot, white silk disease and anthrax are found, the diseased plants and leaves should be removed in time, and the ventilation and light transmission should be strengthened to reduce the environmental humidity. White silk disease is easy to occur in summer. You can irrigate the roots with Bordeaux liquid of 1Drex and 100 Bordeaux, or sprinkle some plant ash or lime on the roots. Black spot and anthracnose can be sprayed with 50% carbendazim 500 to 800 times or 70% topiramate 800 times. After the occurrence of red spiders, aphids and shell insects, the branches and leaves of insects should be cut off in time to reduce the source of insects. It can also be controlled with 1000 times of 40% omethoate or 50% malathion and sprayed for 3 times with good results. I will publish orchid knowledge and pictures every day, take you in-depth understanding of orchids, teach you to easily raise orchids, you can always ask me or leave a message below if you don't understand orchids. If my knowledge brings you help, I hope you can help me or forward it to help more people!