If your peace lily is stressed the color of its leaves can also morph, becoming brown and even black as I said before. If the peace lily spadix matches the color of the leaves, then the plant is certainly stressed. In this case, overwatering your plant is most often the reason.
Why do peace lilies get Brown leaves and tips?
One reason that your peace lilies tips could be going brown is due to overwatering. On the flipside, underwatering can also be a reason that your peace lilies tips are turning brown as well. Excess heat, water quality issues, too much fertilizer, and a drainage problem are a couple extra ideas to look into.
How to revive a peace lily?
How to Revive a Peace LilyA healthy new plant for comparison. Below is a picture of a recently purchased peace lily. Remove dead stems and leaves. Before up-potting the plant, I removed the dead, yellowing leaves and the brown stems as best as I could. Some more things to examine are: back in its place, or long necks and aerial roots.
One more question we ran across in our research was “How do you save a dying peace lily?”.
One way to think about this is add organic compost to the soil. You should add a fertilizer with a 3:1:2 ratio. Fertilize peace lilies every six weeks to prevent nutrient deficiencies. When the peace lily starts to recover, switch the fertilizers, lower in nitrogen and higher in phosphorous.
How to save a peace lily that is dying?
It would be best to stop watering immediately. Provide at least 6 hours of indirect sunlight to the plant. Cut off affected leaves with sharp pruners. Place your peace lily in a well-aerated area. Remove the dead and dying roots and keep the healthy roots. Don’t fertilize the plant before recovery. Water the peace lily when the topsoil is dry.