2, improper watering. Wenzhu although like wet, but afraid of waterlogging. Stagnant water in the pot is easy to cause root rot and yellow leaves. If the potting soil is too dry, not enough water, water shortage will also yellow leaves. Treatment: If the recent watering is frequent, the potting soil is wet for a long time, then it is likely to be rotten roots, you need to stop watering, and put it in a ventilated place to dry out the water. Later watering should also be controlled, rather dry than wet, yellow leaves can slowly improve. The potting soil is too dry, lack of water yellowing and drying, can only timely replenishment of water, will be yellow leaves, dead leaves cut out.
3, fertilizer is too thick. A single application of fertilizer concentration is too high or too high frequency of fertilizer, or not fully fermented organic fertilizer, will cause fertilizer damage, resulting in damage to the root system, resulting in the phenomenon of yellow leaves. Treatment: First, analyze whether there is recent fertilization, if there is often fertilizer or "raw fertilizer", then it is fertilizer damage caused by yellow leaves. If just fertilization soon, yellow leaves are not very serious, you can rinse the pot a few times, dilute the fertilizer in the soil; if the yellow leaves are serious, then we have to pour pots to replace the original soil, replanting.
4, low temperature frostbite. Bamboos do not tolerate low temperatures, winter room temperature is lower than 10 degrees or raised outdoors by cold wind frostbite will appear yellow leaves. If you do not keep warm in time, the whole plant may be frozen to death. Treatment: move the bamboo to a well-lit location, more sun, in addition, if possible, move into the heated room or greenhouse to keep warm, reduce watering. Cut the yellow leaves that are badly frostbitten, and when it warms up, the new leaves can grow back.