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Why Peace Lily Leaf Tips Turn Black

Diagnosing Black Tips

Black tips are more often from low humidity than underwatering (yellowing suggests overwatering). Excess salts from fertilizer or fluoride/chlorine in water can also cause blackening.

Fixes

Group peace lily with other plants to raise local humidity.
Use a pebble tray or humidifier.
Flush soil with distilled water to remove salts.
Switch to distilled or rainwater if tap water is heavily treated.

More Resources

Houseplants Articles: Scale and Sooty Mold on Peace Lily: Natural Treatment; Holes in Peace Lily Leaves: Insects or Cultural Issue?; Cold-Damaged Peace Lily: Prune Black Leaves, Boost Humidity; Troubleshooting Peace Lily Yellow Tips and Small New Leaves; Peace Lily Flowers Hidden by Leaves: Prune for Visibility; Peace Lily in a Windowless Office: LED Light, Watering, and Pot Size Solutions; Natural Treatment for Scale Insects on Peace Lilies; Pruning Brown Leaves on a Peace Lily for a Fresh Look; Peace Lily Black Leaves: Diagnosing Root Rot vs. Sooty Mold; Water Lily Leaves Turning Black: Pot-Bound or Fungus?

Garden Articles

Peace Lily Recovery After Vacation Drought

Peace Lily Soil and Potting Issues

Peace Lily Yellowing: Light, Water, and pH Solutions

Peace Lily Troubles: Yellow Leaves, Brown Tips, and Recovery

Black Leaves on Peace Lily: Overwatering or Poor Drainage

Reviving a Severely Declined Peace Lily

Peace Lily Pest & Cultural Issues: Diagnostic Questions

Plants

Black Spot on Container Rose: Immediate Action Plan

Black Spots on Peace Lily: Likely Scale Insects

Madagascar Dragon Tree (Dracaena marginata): Sticky Black Residue = Insect Infestation

Peace Lily Root Rot: Diagnosis and Drying-Out Protocol

Peace Lily with Sticky Leaves? It's Scale—Here's the Treatment Plan

Why Houseplant Leaves Get Brown Tips: Water, Humidity, and Fertilizer Fixes

Repotting Peace Lilies: Step-by-Step Guide for Rootbound Plants