What to do with the yellow leaves of sunflower

Watery yellow: usually the new leaves are dark yellow and no light, and the old leaves are unchanged. At this time, water should be controlled and the plants should be dried before replanting. Dry yellow: the tip and the bottom of the leaf dry first, and the plant turns yellow from the bottom to the top, but when the new leaf grows normally, it can be replenished with water in time. Lack of light yellow: put the plant in the sunlight, and use the fluorescent lamp to supplement the light properly in case of lack of light. Fertilizer yellow: if too much or too high concentration of fertilizer causes yellowing, stop applying fertilizer immediately and flush the soil fertility with appropriate amount of water.

The symptoms and causes of the yellow leaves of the potted sunflowers at home are different. According to the situation, the medicine can cure the disease.

Sunflower leaves turn yellow

Water yellow

The new leaves of sunflower plants are dark yellow and lusterless, the branches are small yellow green, the growth is slow, but the old leaves have no obvious change, indicating that the water is too much. At this time, the watering should be controlled, the plant should be taken out of the basin, and put in the shade to dry before replanting. Take care not to damage the soil lump of the root system when removing the basin.

Sunflower leaves turn yellow

Dry yellow

If the plant is yellow due to lack of water, the tip and the bottom of the leaf will dry first, and the plant will turn yellow from bottom to top, but the new leaf will grow normally. It's easy to solve. Just water it! However, do not pour too much water at one time to ensure that the soil is wet.

Yellow light

Many plants burn their leaves because of too much light. But unlike sunflowers, they need plenty of sunshine during their growth. If it is kept in shade for a long time, the whole leaf will turn yellow and fall off. Put the plant in the sunlight, and use the fluorescent lamp to make up for the lack of light.

Sunflower leaves turn yellow

Fat yellow

The root system of sunflower is developed, it can absorb nutrients in the soil, and does not need concentrated fertilizer. Too much fertilization or too much concentration will cause yellow leaves. Usually, the leaves are dull and uneven with old leaves falling off. At this time, it is necessary to stop fertilizing immediately and flush the soil fertility with appropriate amount of water. The most effective way is to sprinkle some radish and cabbage seeds around the plants to let them absorb nutrients from the soil.

Yellow manure

The lack of fertilizer means that the plants are hungry, which means that the seedlings in the basin are large, the fibrous roots in the basin are dense, and the flowers and leaves are dark yellow. At this time, it is necessary to change a large basin, cut off the old leaves of the plant, and change the soil in time if the soil is dry. At ordinary times, pay attention to thin fertilizer and apply it frequently. You can pour some alum water in proper amount.