The 20 words are full of flowers.
As a traditional flower in China, orchid has always been deeply loved by flower friends. However, in summer and autumn, orchids are prone to problems, and some skills should be paid attention to when maintaining them. So, raise orchids in summer and autumn, want flowers to hang all over the branches, understand these 20 words well.
1. Shading and ventilation
Orchids should be shaded from early summer to the end of September, and their shade should not be less than 70%. When shading, a large amount of sunshade net is used, and a small amount is placed under the north balcony and eaves. During this period, the plants should be sparse, and the distance between pots and pots should not be less than 10 cm. Under the basin, it is best to use bricks to support it, increase the ventilation rate, and make it ventilated.
2. Cooling and humidification
The suitable temperature for orchid growth is 20: 28 ℃. The orchid grows rapidly above 25 ℃. When it exceeds 32 ℃, it is forced to go into dormancy and its growth is stagnant. When the temperature reaches 30 ℃, it is necessary to take measures of cooling and humidification. For those raised in the open air, they can be covered with river sand or plastic film on the ground; those raised on the balcony, pad sponges under the basin, and often keep moist.
Spray the plant many times a day and sprinkle water on the ground. Indoor growers can keep the temperature below 30 ℃ and keep the air humidity above 70% with the help of air conditioners or electric fans.
3. Watering and fertilization
Most of the orchids raised by flower friends are cultivated in soil, and most of them are potted. Pot soil moisture should adhere to the "moist but not wet, dry but not dry" principle, watering should be carried out when the topsoil is slightly white, do not overwatering, resulting in rotten roots. From midsummer to early autumn, it is generally watered once in the morning, and watered as appropriate in the evening depending on the degree of dryness and wetness of the basin soil. If the basin soil is found to be dry after noon, water should be replenished at any time. After mid-autumn, although the climate is getting cooler, but the air is dry, according to the requirements of "autumn is not dry", it is appropriate to keep the basin soil moist.
Fertilizing orchids should be based on the principle of small amount, thinness, frequent watering and timely, especially in summer and autumn. From May to September, fertilizer should be applied according to different orchid species and different growth stages. For the orchid plants in the dormant period or when the temperature is above 30 ℃, the fertilization will be suspended. The liquid fertilizer is usually applied once every 15 to 20 days, and the organic nutrient solution for orchids is used, and the ratio of fertilizer to water is 1: 500. The concentration of foliar fertilizer spraying was 1, 000 times.
4. Disease prevention and pest control
Orchid is a plant with many diseases and insect pests, especially in high temperature and humidity season, so attention should be paid to prevention and control.
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