Why do leek leaves turn yellow? Can you still eat leek leaves when they turn red?

1. Reasons for yellowing leaves

1. Soil acidification: It prefers a neutral soil environment. Applying acidic fertilizers such as manure, cake fertilizer, superphosphate, etc. for a long time during management can easily cause the soil to become acidic, which will gradually lead to slower growth and yellowing of leaves. At this time, it is necessary to apply an appropriate amount of organic fertilizer and supplement trace elements.

2. Unsuitable temperature: Chives have poor resistance to cold and high temperatures. If the temperature in the greenhouse is above 35 degrees for a long time, coupled with dry air, this situation will easily lead to leaf burns and dry leaves. If cold air suddenly invades at this time, the whole plant will turn yellow. Be sure to pay attention to the temperature. When the temperature is high, ventilate more, spray water frequently to keep it moist, and avoid yellowing leaves as much as possible.

3. Infection with pests and diseases: If the environment is not suitable during the management period, it is easy to be infected with pests and diseases, and yellow leaves will appear at this time. It needs to be treated with spray as soon as possible. It is recommended to use highly effective and low-toxic agents. In addition, we should pay attention to prevention in daily life to reduce diseases and insect pests.

2. Can the leaves still be eaten when they are red?

The redness of leek leaves is mostly due to infection with pests or diseases. It is best not to eat them to avoid causing discomfort. In addition, be sure to wash it thoroughly before eating to avoid pesticide residues.