Cause: waterlogging is easy to cause the roots of the bamboo to rot, resulting in the leaves to blacken.
Solution: drain the water in the basin in time. Then take out the bamboo, wash away the soil on the root with water, trim the rotten root, and smear it on the wound with carbendazim to avoid bacterial infection. The bamboo will be replanted in the dry basin soil, and pay attention to water control, so that the basin soil can be slightly dry.
Cause: the winter temperature is too low to cause it to be frostbitten, frostbitten leaves will appear black symptoms.
Solution: move the bamboo to the house, and ensure the indoor temperature is not lower than 5 ℃. If the indoor temperature is too low, you can use plastic bags to cover the plants for heat preservation, remember to take it away for a while every day for ventilation.
Cause: lack of nutrients leads to poor growth and development of the bamboo, which makes the leaves black.
Solution: generally in winter, as long as the temperature is kept above 15 ℃, the plant can grow normally. Therefore, fertilizer is still needed at this time. You can choose the rotten cake fertilizer water and water it every 2-3 weeks. Be careful not to spray on the blade surface to avoid corrosion.
Reason: although it is suitable to grow in a cool environment, the leaves will not grow well for a long time.
Solution: put it in an astigmatic environment. If it's winter, you can put it directly in the sun. In summer, you need to shade it. Light time as long as possible, which helps to improve the resistance of the plant, so that the leaves are bright green.
