During the growth of lily, the leaves often turn yellow, which is mostly caused by the imbalance of cultivation and management. The causes of yellowing are different. We should carefully observe and analyze the causes and correct them. What are the specific reasons for the yellowing of Lily leaves? I hope the relevant information provided below can help you.
Lily leaves turn yellow cause analysis and treatment methods of Lily leaves turn yellow: 1. Excessive watering leads to Lily leaves turn yellow (water yellow): the young leaves are dark yellow and dull, the old leaves have no obvious change, the branches are small yellow and green, and the new shoots shrink and do not grow, indicating excessive watering.
Solution: put the flower off the basin in a ventilated and cool place, blow dry the soil mass, and then put it back into the basin.
2. The lily is dry and yellow, but its leaves are yellow from the bottom to the top.
Solution: pay attention to watering enough and thoroughly.
3. Exposure to the sun leads to yellowing of Lily leaves (burning yellow): strong sunlight is directly directed to some shade loving flowers, which is easy to cause withering of flower leaf tips and leaf edges, and yellow spots appear in the Chaoyang part of the leaves.
Solution: move to the shade.
4. Air drying leads to yellow lily leaves: when the indoor air is too dry, some flowers that like humid environment, such as Chlorophytum and orchid, often have dry leaf tips or scorched leaf edges.
Solution: pay attention to increasing air humidity by spraying water and covering with plastic film cover.
5. Insufficient sunlight leads to yellowing of Lily leaves (lack of light yellow): if the lily leaves are placed in the shade environment for a long time, the leaves can not get enough sunlight and can not form chlorophyll, and the whole plant leaves turn yellow and then fall off.
Solution: pay attention to move the flowerpot to the sunny place.
6. Low temperature leads to yellowing of Lily leaves: the room temperature is too low in winter. Flowers that like high temperature are often vulnerable to cold damage, resulting in yellowing of leaves and death in serious cases. If the room temperature is too high, the plant transpiration is too high, the root water and nutrients are in short supply, and the leaves will turn yellow.
Solution: please adjust the room temperature in time.
7. Excessive fertilization of Lily leaves leads to yellowing (fat yellow): excessive fertilization will lead to hypertrophy of new leaves, which are mostly uneven, and the dry tips of old leaves are scorched and yellow and fall off.
Solution: stop fertilization immediately, increase the amount of watering, make the fertilizer flow out of the drainage hole at the bottom of the basin, or pour the basin immediately, wash the soil lump with water, and then plant it again in the basin.
8. Lily leaves turn yellow due to long-term lack of fertilizer (lack of fertilizer yellow): the color of young leaves becomes light, yellow or light green, while the old leaves are normal or gradually turn from green to yellow.
Solution: check the basin soil, change the soil if there is dry knot, apply thin fertilizer frequently at ordinary times, and pour some alum water in time.
9. Yellow lily leaves caused by diseases and insect pests: leaf spot disease caused by fungi and other pathogens is easy to cause local necrosis of leaves, yellow spots or patches. In serious cases, the whole leaf withers and falls off, and yellow and green embedded spots appear on the leaves after being infected by mosaic virus; If damaged by scale insects and red spiders, the leaves will become partially yellow and withered, and even the whole leaf will wither and fall off.
Solution: timely spraying for prevention and control.
Lily maintenance experience: 1. Iron deficient yellow leaves. Due to the great change of soil fertility conditions, woody flowers in greenhouse often appear yellow leaves, which are characterized by obvious young leaves, light old leaves, yellow mesophyll and green veins, and form a typical network; Ferrous sulfate aqueous solution can be applied to solve the problem. The method is as follows: 7 parts of cake fertilizer, 5 parts of ferrous sulfate and 200 parts of water.
2. Strong sexual stimulation. Excessive pesticide concentration in pest control, or pollution by toxic gases in the atmosphere, or sudden watering of cold water when the temperature is high, are easy to cause local yellowing and scorching of leaf tip or leaf surface, or even death of the whole plant. Therefore, we should pay attention to the rational use of pesticides and try to eliminate air pollution sources. Avoid watering flowers with cold water around noon in midsummer. Finally, it should also be mentioned that the yellow leaves of potted flowers are sometimes caused by one reason, but they are often caused by a variety of factors. Correct diagnosis should be made before the remedy can be applied to the case.
3. The soil is acidic. The red loam in South China is acidic, and magnesium is easy to be lost. When planting flowers and trees that are alkali resistant or like slightly sealed soil, it is often easy to lose green and yellow between the veins of old leaves. Calcium magnesium phosphate fertilizer can be applied or magnesium sulfate solution can be sprayed.
4. Airtight. If too much nitrogen fertilizer is applied, the branches and leaves will grow luxuriantly. In addition, if they are not trimmed for a long time, the light of the inner chamber branches and leaves will be insufficient, which is easy to cause the leaves to turn yellow and fall off. Fertilization should be reasonable and pruning should be strengthened to make it ventilated and transparent.
5. The temperature should not be too high, preferably between 15 ℃ and 25 ℃, which will be lower than 10 ℃ or higher than 30 ℃. In addition, there shall be no smoke and heating facilities close to heating. When ventilating, it shall be blown with slow wind, and the external wind shall not be blown directly on the lily. Spraying water for humidification shall not be carried out after evening, but in the morning.