How can my hosta turn yellow, please everyone, thank you

Which part is yellow? Is it the bottom leaf? Or is it a new leaf on top? If it's the leaves at the bottom, then it doesn't matter, it's because the old leaves are naturally yellowing and falling off, and it doesn't matter If it's the new leaves on top, then you have to consider whether it's a lack of fertilizer or light?

Reasons why hosta flower leaves turn yellow:

1. Water yellow: the potting soil is wet for a long time, resulting in soil hypoxia, which makes some roots rot, water absorption and fertilizer absorption ability weakened. It is manifested in the young leaves are dark yellow and dull, the apical center of the new shoots is atrophied, and the branches and stems are small and yellow-green.

In this case, the soil should be loosened, watering should be controlled, fertilizer should be stopped, and the heavy ones can be depotted, and the soil balls should be dried in the shade and then potted.

2. Fat yellow: due to excessive fertilization or excessive concentration, especially the yellow leaves caused by partial nitrogen fertilizer, the new leaves are thick and shiny, but the leaf surface is uneven and unstretched, and the old leaves gradually turn yellow and fall off. At this time, the fertilization should be stopped and the amount of watering should be increased appropriately to dilute the nutrients, the potted flower fertilizer water is insufficient or the pot is small, the root system in the pot is senescent or too dense, and the leaves of the flower plant will become thinner and yellow, at this time the pot should be changed and the soil should be changed, usually when the rain arrives at the beginning of summer.

3. Alkali yellow: potted acid-loving flowers, such as camellia, Milan, smiling, rhododendron, jasmine, etc., often cause green loss and yellowing due to soil alkaline reaction. It is manifested in the veins that start from the new leaves of the branches, and the leaf veins, especially the main veins, remain green, and the yellow-green phenomenon is very obvious.

With the aggravation of the degree of yellowing, the leaf veins gradually lose green, and then the whole leaf is white, the leaf edge is scorched, the leaf is littered, and the branches are withered in severe cases, so that the whole plant dies.

4. Yin yellow: Flowers that like sunlight often cause the branches and leaves to wither due to insufficient indoor light, so the pot should be moved to the outdoor ventilation and lighting. For semi-negative flowers, such as bamboo, the leaves will also turn yellow under strong light, so to avoid exposure to high temperature and strong light in summer, they should be moved indoors or set up in a shade shed for storage.

5. Dry yellow: due to long-term lack of watering, or less watering, the leaves are yellowing or brown ends, brown edges, and the old leaves are yellowed and fall off from the bottom up. However, the new leaves generally grow normally, and when this phenomenon occurs, water should be replenished so that the soil is no longer short of water.

6. Burning yellow: like shade and dampness potted flowers, such as spider plant, evergreen, hosta, etc., such as strong direct sunlight, the leaves also have brown ends, brown edges, this phenomenon occurs, the pot can be placed in the shade.

7. Damp heat yellow: some potted flowers that are not resistant to high temperature and high humidity have yellow leaves caused by poor ventilation and improper shading in midsummer, such as hanging bell begonias in summer. Therefore, high temperature and high humidity are also easy to cause leaves to turn yellow, this kind of leaf yellowing can be prevented as long as attention is paid to ventilation and cooling, and the potting soil can not be too wet.

Watering too much water causes a lack of oxygen at the bottom of the pot and poor ventilation.

Deficiency of yellowing virus, insect fertilizer is possible.

Hello! The growth of the plant is generally weak, which is manifested in the weak petioles, thin leaves and yellowing.

It may be related to long-term insufficient light, excessive watering, or poor drainage, and long-term over-wetting of potting soil resulting in reduced root vigor or lack of fertilizer; After the end of autumn, as the air temperature and ground temperature gradually decrease, the growth of plants will stop and enter a dormant state, and the leaves will gradually turn yellow until all the aboveground parts wither after winter, which is a normal physiological process. FYI.