Reason 1. Yellow water: The accumulated water in the basin soil is wet for a long time, which leads to the lack of oxygen in the soil and weakens the ability of some roots to rot and absorb water and fertilizer. As can be seen from the dark yellow and dim leaves,
The top of the new shoot shrinks, and the branches are small and yellow-green. In this case, we should loosen the soil, control watering and stop fertilizing. In severe cases, we can take off the pot and put it in the shade to dry the soil balls and put them in the pot. Reason two. Fat yellow: Yellow leaves caused by excessive fertilization or excessive concentration, especially by partial application of nitrogen fertilizer, characterized by thick and shiny new leaves, but uneven leaves, and old leaves gradually turn yellow and fall off. At this time, fertilization should be stopped, the amount of watering should be increased appropriately, and nutrients should be diluted. Potted flowers are short of fertilizer and water, or a big pot is small, and the roots in the pot are aging or too dense, which will also make the leaves of flowers and plants thin and yellow. At this time, it is necessary to change pots and soil, usually from rainy to long summer.
Reason 3: Alkaline yellowing: It is often caused by alkaline reaction of soil. It is manifested in the veins starting from the new leaves at the branches, while the veins, especially the main veins, remain green and the yellow-green phenomenon is very obvious. With the aggravation of yellowing, the veins gradually turn green, and then the whole leaves turn white.
The leaf edge is scorched, the leaves wither, and in severe cases, the branches wither and even the whole plant dies. For this "yellowing" phenomenon, acid fertilizers or acidic substances can be used to improve it, and alum fertilizer can also be used frequently. Reason 4: Yinhuang: Due to insufficient indoor light, branches and leaves often turn yellow. At this point, pots and pans should be moved to outdoor ventilation and lighting. For semi-negative flowers, such as asparagus,
Leaves will also turn yellow under strong light, so in summer, we should avoid exposure to high temperature and strong light, move indoors or build a shade shed for storage. Reason 5: Drought and yellowing: Due to long-term no watering or less watering, the leaves turn yellow or brown ends and brown edges appear, and the old leaves fall off from bottom to top. However, new leaves generally grow normally, so when this happens, water should be added to make the soil no longer short of water.
Reason 6, burning yellow: this phenomenon occurs, as long as the basin is placed in the shade.
Reason seven, damp and hot yellow: yellow leaves caused by poor ventilation and improper shading in midsummer, such as hanging bell begonia in summer. Therefore, high temperature and high humidity can easily lead to yellowing of leaves, which can be prevented by paying attention to ventilation and cooling, and the soil in the basin should not be too wet.
The cause analysis and the whole content of the solution, I believe that after reading this article, everyone has a basic understanding of how to do a good job in yellowing the leaves of cash cows. If you want to know more about decoration consultation,
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