There are many reasons for the yellowing of potted flowers, which is also a problem that flower growers frequently encounter. If you do not find governance in a timely manner, it will lead to death. The main reasons are the following. 1. Watery yellow loquat soil Long-term water wetlands make flowers rot, can not normally absorb water and fertilizer, and produce leaf yellow off dead. The treatment method is to find yellow leaves and immediately stop watering. The loose soil is placed in a ventilated and dry place to speed up the evaporation of water. Watering standard is to see dry see wet basin, once drenched, do not sporadic watering. 2. Dry and yellow water shortages, such as water-sagging leaves, should be immediately sprayed on the leaves to absorb water faster. Then water the pot, pay attention to less soil to let the soil wet, do not water more. 3. Light intensity exposure Ye Huang summer sun exposure, mosaic yellow macular (sunburn). Spray water in time to reduce temperature and increase humidity. To add shade nets, flowers can grow normally. 4. Over-concentration of fat and yellow leaves with too much concentrated fertilizer, the flowers can not absorb the roots to burn, can not absorb water and mosaic yellow leaves. Apply thin fertilizer once a week in the summer. Do not apply more concentrated fertilizer. If you apply too much fertilizer, you can use more water to remove the fertilizer. 5. Lack of fat leaves, thin yellow, lack of fat, yellow flowers, thin branches and tender yellow. Fertilization should be applied immediately and it will take effect within one week. Fertilizer can be applied on schedule so that the flowers normally grow and bloom more. 6. Alkali Leaching Ye Huang As potted plants are watered for a long time, saline soil is accumulated in the pots and soils. In severe cases, there are alkaline shells on the pots and soils, so that the mosaic leaves off. In particular, the northern soil and water contain alkali. The method is to replace the soil or ferrous sulfate solution and neutralization. 7. Acid-reduced leaves Yellow flowers are sour, and pH 6.0 grows normally. If the pH value exceeds 7, the young shoots of the shoots begin to yellow, and the yellow leaves of the old leaves wither and die. Apply ferrous sulfate once a month for normal growth. 8. When acid sulphate is applied to ferrous sulphate, apply proportionately according to the instructions. Do not apply more. If the leaves are also yellow (do not fall off), the alkaline water can be properly adjusted. 9. Large flowering lobule Yellow flowers need more water and fertilizer because of their large root system. Small pots cannot meet the needs of flower growth. The old leaves are dry and yellow, and the leaves are thin and yellow. To change the appropriate pots, 30% humus is added to the soil to allow the flowers to grow normally. 10. Disease Yellow leaf flowers should always pay attention to the prevention of diseases during the growth process, and timely spraying. The common disease is "powdery disease". The back of the leaves resembles a white powder, causing the yellow leaves to fall. The "brown spot" leaves have black spots on the opposite sides of the leaves, as well as gray mold. The main reason is poor lighting and poor ventilation. 11. Insect pests Yellow leaf flowers are prone to insect pests at high temperatures in the summer. Attention should be paid to the prevention of spraying in advance. Common locusts, whiteflies, red spiders, locusts and so on. The back of the flower blade absorbs nutrients and moisture, leaving the leaves yellow. To exterminate insects in time can be restored.
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