How to grow and breed white orchids in the north

Two points should be paid attention to in choosing the potted soil of white orchids: one is that white orchids are fleshy roots and like the soil with good permeability, and the other is that white orchids belong to southern flowers and like acidic soil. The soil in the north is alkaline, so when mixing cultivated soil, appropriate amount of ferrous sulfate or sulfur powder should be added to increase the acidity of the soil.

II. Water and fertilizer management

Watering is very important to cultivate white orchids in the north. The essence that the white orchid likes the humid environment is that the air humidity is high but the soil water content can not be too high. The water in the north is alkaline, and it is easy to alkalize the soil after long-term use, so it is best to use Rain Water, snow water or ferrous sulfate. But Rain Water and snow water are not easy to retain, usually pour tap water, regularly (every 10 days or so) irrigated ferrous sulfate, will not make the plant yellow disease.

Third, light and temperature control

White orchids are not strict with light, but excessive or insufficient light is not conducive to plant growth, too strong light is easy to burn leaves, lack of light is not easy to form flower buds, even if there are flowers are not fragrant. It should be placed in a sunny place in spring, after the Mid-Autumn Festival and in winter to receive light. Summer and early autumn should be placed in a semi-shaded place to cover 50% of the light so that it can receive sunlight before 9 am and after 6 pm, so as to avoid direct noon light.

IV. Pest control

The common diseases of white orchids are anthracnose, leaf spot and yellowing, and the main insect pests are red spiders, shell insects and aphids. In daily maintenance, in addition to strengthening water and fertilizer management and improving plant disease resistance, attention should also be paid to ventilation. If pests occur, they can be caught manually when the number is small. When the number is large, red spiders can be sprayed with 1000 times of dicofol and 1000 times of omethoate EC can be used to kill shell insects and aphids. Anthracnose and leaf spot can be controlled with broad-spectrum fungicides such as chlorothalonil and carbendazim. Chlorosis can be prevented and treated by foliar spraying with ferrous sulfate solution of 1 stroke 800. .