1. Incorrect basin. When Milan is in the basin, if the substrate is not good, such as the pH is too alkaline, too sticky, the basin is too late, and the light is too poor after putting the basin, the leaves will fall off. Therefore, it is necessary to select the substrate, put the drainage layer in place, and change the basin as soon as possible after leaving the house. When changing pots, if the soil balls are scattered or planted too deeply, a large number of lower branches and leaves will turn yellow within 1 ~ 2 weeks after planting.
2. Improper water management In midsummer, the soil in the basin is too dry, or it is on a business trip, and no one waters it. When it comes back, it is easy to turn the old leaves yellow. In addition, if you water too much, the roots will be dyed. This yellow leaf is characterized by its high speed and large quantity.
3. If you don't prune unreasonably, the crown of Milan will be closed and the lighting conditions will be poor, so the main cadres will not pull out branches and grow leaves. During cultivation, the branches can be spread out to improve the lighting conditions and control the growth of the upper branches in time.
4. Poor management in winter causes leaves to fall off. In the second year, branches and leaves grew on the upper part of the plant, and the cadres could not germinate, resulting in baldness of the plant cadres.