If your plant's stems are turning black, it is likely due to a lack of light or too much water.

Plant Stems Turning Black (Causes and Treatment)

When you notice your plant’s stems turning black, it can be alarming. There are several possible causes of blackened stems, including disease, pests, or environmental stressors. However, there are also some simple treatments that can help save your plant. Keep reading to learn more about the causes of blackened plant stems and how to treat them.