Reason: Lily does not like wet environment very much, watering too much will cause its bulb to breathe difficultly, thus produce yellow leaf.
Solution: if there is water in the flowerpot, drain it as soon as possible. It is also necessary to loosen the soil properly, accelerate the evaporation of water in the soil, or replace the dry soil for replanting. At ordinary times, pay attention to the control of water quantity and keep the soil in a slightly moist state. In addition, you can put the flowerpot in the ventilated place, good air circulation can also alleviate the problem of humidity.
Cause: lack of nutrients leads to poor growth of lily, which makes leaves yellow.
Solution: fertilization will change with lily growth. In the growth period, the compound fertilizer should be applied 2-3 times a month, and the potassium dihydrogen phosphate can also be applied before flowering. After flowering, the fertilizer should be applied moderately to provide nutrients for the seed ball. Fertilization should not be too thick, otherwise it will hurt the bulb and affect its development.
Reason: long term fertilization is easy to cause soil hardening, so that water can not penetrate to the root, and then lead to yellow leaves.
Solution: after the lilies take off the ball, pour out the original basin soil, and then replace it with new soil when planting in winter. If you don't play the ball, you need to loosen the soil regularly. When loosening the soil, be careful not to damage the ball root
Cause: SAP sucking pests and some diseases can cause poor growth, which can cause yellow leaves.
Solution: if the disease is found, the diseased branches and leaves should be cut off and burned to avoid the spread of the disease, and at the same time, spray medicine for treatment. For pests, less can be removed manually, more need to spray pesticides to kill pests.
