Peace Lily Brown/Black Leaves: Light, Water, and Genetics

Peace lily leaves turning dark brown or black usually indicate chronic underwatering or insufficient light—not disease. Over‑fertilizing a stressed plant worsens the problem.

Corrective Measures

1. Place within 2 feet of a bright east or north window.
2. Water just as the plant begins to wilt; learn its rhythm.
3. Keep the plant potbound—do not repot.
4. Stop fertilizing until the plant is healthy and growing vigorously.

Blooming Reality

Many peace lilies are hybrids bred for a spectacular show at point‑of‑sale. They often flower poorly afterward regardless of care. Focus on foliage health; flowers are a bonus.