1、 Change the water in time

If the water is not changed for a long time, the water quality inside the water is polluted, resulting in the breeding of bacteria, which may lead to blackening. You can cut off the blackened roots and leaves, then clean the container, dry the connected tap water and replace it into the container again, and then continue to put it in for maintenance. After that, pay attention to the frequency of water change. When the temperature is high, change the water every 5-10 days. When the weather turns cold, change the water every 15-20 days to ensure a clean water quality environment

2、 Adjust temperature

It can't stand the cold climate, especially the water cultured white crane taro. When the temperature in winter is lower than 5 ℃, the plant will be difficult to grow normally and will suffer from freezing injury, resulting in the blackening of the water cultured white crane taro. It is necessary to adjust the temperature in time, and turn to indoor maintenance in winter. It is best to maintain the temperature above 10 ℃

3、 Lower the water level

When raising white crane taro in water, if too much water is added, resulting in higher water level, it will lead to too much water in the rhizome, which may lead to rot and blackening. Take out the plant, trim the blackened part properly, and then add water again for maintenance