Brown leaf tips on peace lilies look like classic signs of underwatering or low humidity. Most people respond by watering more frequently or misting their plant daily, expecting the brown tips to disappear. Instead, the problem persists or worsens, spreading from the tips further down the leaves.
The actual culprit isn't moisture-related at all. Fluoride and chlorine in tap water accumulate in peace lily leaf tips over time, causing the distinctive brown discoloration that ruins the plant's appearance. These chemicals don't flush out through normal watering; they build up progressively until visible damage appears.
