Learn 7 causes and simple solutions to restore your plant’s health and keep it thriving indoors. · find out 10 reasons why peace lily leaves are turning black and learn effective fixes to restore your plant’s health · peace lily leaves turn black or have black spots due to fungal infections, and pests also lead to this problem. · we asked gardening pros to share why peace lily leaves turn black and they share six reasons and easy fixes. · black leaves on your peace lily ? Here are 10 possible reasons why your peace lily leaves turn black and what you can do about it. · peace lily leaves can turn black when they are exposed to chemicals in the soil, they are getting too much sun, or due to root rot. Other causes are overfertilizing, improper amount of light, low percentage of humidity, and improper choice of potting mix. But what happens when the leaves start to turn black ? · peace lily plants are beautiful, easy to care for and make excellent houseplants. They are known for their white flowers that bloom throughout the year. · peace lily leaves turning black not only looks bad, but it also means your plant is unhealthy. Learn all about why this is happening and how to solve it.