Thirteen causes and solutions of yellowing of potted flowers leaves

Potted flowers are prone to yellowing if they are not properly managed because of the limited growth and development of their roots. Corresponding measures should be taken for different reasons:

(1) Improper watering and excessive watering led to partial fibrous roots rotting and tender leaves turning pale yellow. Therefore, watering should be controlled immediately, fertilization should be stopped, and soil should be loosened frequently to make the basin soil breathable. Too little watering or half watering for a long time leads to insufficient water supply, and the lower leaves gradually turn yellow and wither. It is necessary to move the flowerpot to the shade, spray water on the leaves, and water slightly, and then increase the watering amount after the stems and leaves gradually return to straightness.

(2) Improper fertilization, excessive fertilization, uneven thickness of new leaves, and gradual yellowing and shedding of old leaves, should immediately stop fertilization and increase the amount of watering; Insufficient fertilization, especially if nitrogen fertilizer is not applied for a long time or the soil in the pot is not changed, and the leaves are thin and yellow, the pot should be watered in time, and the seedlings should be delayed after watering, and then diluted liquid fertilizer or compound chemical fertilizer should be applied after it resumes growth.

(3) The pH of the soil is not suitable. Flowers planted in acidic soil in the north will gradually turn green and yellow due to the lack of soluble iron after planting for a period of time because the soil in the north is too alkaline, and 0.2% ferrous sulfate solution can be poured; In southern China, the soil is acidic, and magnesium in the soil is easily lost. Because of magnesium deficiency, the veins of old leaves often turn green first and then yellow, so calcium magnesium phosphate fertilizer can be applied.

(4) The lighting conditions are not suitable for summer. Flowers that like semi-shade and are afraid of high temperature and heat should be kept in direct sunlight, which may easily cause the young leaf buds or leaf edges to burn or the whole leaves to yellow, so they should be moved to a ventilated and cool place for cultivation. If you spend a long time in a place with insufficient light, the growth potential is weak, the leaves are thin and yellow, and they don't bloom or rarely bloom, so you should put them in an outdoor sunny place.

In addition, when the air humidity is too low and there are pests and diseases, it is easy to cause the leaves to turn yellow.