1, in the flower market to buy back most of the flowers and plants will be so, because of the sudden change in the environment, because the home temperature and humidity and light and the maintenance of the temperature and humidity of the environment in the greenhouse is a big difference, or is to change pots to hurt the roots need to slow down, and caused by the yellowing of the leaves;

2, a large number of leaves may be related to the watering, because the plants, if in the case of soil over-drying, the root system will be somewhat damaged, at this time, pouring a lot of water, so that the original damaged root system suffocation, respiratory resistance, the roots of the original damaged root system. Root system will be damaged to a certain extent, at this time, pouring a large amount of water, so that the original damaged root system to produce suffocation, respiration is blocked, the root system is further damaged, affecting the absorption, resulting in a large number of leaf drop.

3, poor ventilation due to poor air permeability, the tip of the leaves appear yellow; dry indoor air caused by the leaves can be sprayed 2 times a day to 3 times on the water, can effectively prevent the tip of the newly drawn leaves yellow.

4, may be the plant is located in the environment is too dark, caused by insufficient light, you can place it in a brighter place, in the temperature below 20 ℃ but also full sunlight environment;

5, fertilizer is not too much, the application of organic fertilizers are not rotted and so on.