Excess or lack of potassium in the lower yellow leaf ring The lack of potassium or potassium in the soil caused the yellow edges of the leaves to appear mostly in the lower middle leaves. Generally, the phenomenon of potassium deficiency rarely occurs, and the yellow edge caused by excessive potassium is the most common. Low temperature or high yellow leaves If the temperature in the greenhouse is too low, the blades become brittle and the leaves are yellowed to form parachute leaves. If the temperature is too high, the leaf edge moisture will evaporate quickly, causing leaf edge burns and yellowish dryness. Yellow or yellow leaf edges This situation is mostly victimized in the middle and lower leaves. The leaf margins turn yellow at the beginning, and the leaf margins are scorched at later stages, and the flowers and fruit are seriously damaged. It also includes smoking too long time or large amount of smoke, or high temperature medication. Soil environment deteriorated Excessive chemical fertilizers applied in successive years will lead to soil compaction, soil salinization, poor root development, and gold-rimmed edges. Root injury blade yellow edge Some agricultural operations cause the roots to self-injury or water, which causes the roots to fall, thereby reducing the ability of the roots to absorb nutrients and causing yellow edges of the leaves. Calcium-deficient top leaves inlaid with gold The metabolism of calcium is imbalanced. The leaf margins of the upper and middle leaves turn yellow and the leaf margins roll down to form parachute leaves. Severe calcium deficiency, low temperature cultivation of melon crops, especially the top of the new cucumber leaves dry yellow. Http:// Liquid Bleach,Laundry Detergent Stain Removal,Stain Removal Bleach,Laundry Detergent Bleach Wuxi Keni Daily Cosmetics Co.,Ltd , https://www.kenidailycosmetics.com