Too much water for long-term watering of pots and soils, and wet stalks suffocate the roots and rot. They do not normally absorb water and fertilizer and cause yellow leaves to fall off. Yellow leaf was found to stop watering immediately, and loose soil was placed in a ventilated and dry place to speed up water evaporation. Watering should adhere to the principle of "see dry see wet, pouring is poured" principle, do not sporadic watering. In addition, flowering should not be used to spray water and prevent rainstorms. Water shortages, such as water-sagging leaves, should immediately spray water on the leaves to speed up the plant's absorption of water, and then water the pot. At this time, pay attention to less water to make the soil moist, and do not water it. . Improper fertilization in potted peanuts for a long period of time without long-term fertilization or insufficient fertilization will cause yellowing phenomenon; excessive application of concentrated fertilizers will not absorb the roots and the flowers will not be able to absorb water and will also cause yellow leaf to leach. Fertilizer, do not apply more concentrated fertilizer. If you over-fertilize, you can dilute with more water and flush out the fertilizer. Fertilizer deficiency can lead to potted soil consolidation, mosaic yellow, thin, thin, branches slender yellow tender. Fertilizer should be applied immediately and it should be effective within one week. Fertilizer can be applied on schedule so that flowers normally grow and bloom more. Excessive temperature In summer high temperature seasons, sexually cool and shade-tolerant flowers are often exposed to high temperature and strong sunlight, which may easily cause the young leaves tip or leaf edges to dry. If this happens, it must be promptly moved to a shaded and ventilated place. Spray water cooling, increase the humidity conducive to flower growth. Alkali due to long-term watering potted plants, basin soil accumulation of saline and alkali, when the basin has a large amount of alkaline shell leaves off. The method is to exchange new soil or spray the ferrous sulfate aqueous solution to the leaves to neutralize. The use of the manure fertilizer water and fermented Taomi Shui can achieve better results, but do not apply too much, such as excessive fertilization of ferrous sulfate, The leaves are also yellow, but do not fall off. At this time, alkaline water should be adjusted appropriately. The air is dried in the north to cultivate some of the flowers that prefer the moist environment of the air. Such as camellia, orchids, etc., excessive drying of the air will often lead to the tip of the leaves dry, coked leaves or focal spots on the leaves. The edges curl and wrinkle and turn brown and other symptoms. Especially in the winter season, coal fire and heating heating in indoor areas are more serious. At this time, water and leaf spray should be used at room temperature to increase the air humidity. In the summer, the family can grow flowers on the terrace and sprinkle water on the balcony floor to make the local environment. It is moist and has a cooling effect. Flowers large pots and small flowers due to large root system, the need for water and fertilizer, small pots can not meet the needs of flower growth, when the old leaves are often dry yellow dull, yellow and thin leaves, to change the appropriate basin, add 30% soil humification Soil grows normally. Branches and leaves too dense and lush growth plus long-term without pruning, so that the lack of illumination in the inner branches and leaves, the emergence of leaf yellow off phenomenon, should strengthen the pruning of the inner church ventilation, and appropriate fertilization. Insufficient light to cultivate hi-sun flowers, such as rose, pomegranate long placed its place in the light is too weak, the plants will gradually weaken, thin and yellow leaves, do not flower or less flowering. Since the spring flowers are cold and cold in the autumn, the flowers are subjected to frost damage and yellow leaves. They need to be insulated in the room and strengthen the cold-resistant exercise of pot flowers in advance. Pests and insect pests are affected by the mosaic virus, yellow and green spots are embedded in the leaves, and they are caused by fungi and other pathogens to cause leaf spot disease. It is easy to make the leaves partially necrotic. Attention should be paid to disease prevention and timely spraying. Give plenty of light and ventilation. In the summer heat season is easy to produce pests, to spray prevention, generally locusts, spider mites, etc., in the back of the leaves to absorb nutrition and water, so that leaves yellow and even the whole plant leaves chlorosis, timely exterminate can be restored. Other flowers are poisoned by poisonous gases in the atmosphere, or sudden pouring of cold water at high temperatures can cause physiological drought. When spraying pesticides with high concentration to control pests and diseases, they can cause partial scorch of the tip or leaves, or even the death of the whole plant. Therefore, attention should be paid to the exclusion of air. Sources of pollution, planting of anti-pollution plants, and rational use of pesticides, hot summer days before 10 o'clock in the afternoon, 4 o'clock after the water is appropriate.
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