Bird's Nest Fern Turning Black? It's Likely Root Rot

A bird's nest fern's new fronds turning black signals root trouble—usually rot from overwatering or an oversized pot. The owner used a moisture meter, but these devices are notoriously unreliable.

Correct Watering Technique

Water only when the soil surface feels dry to the touch. Empty the saucer after an hour. If you repotted recently, that's likely the cause; these ferns rarely need larger pots.

Moisture meters often read "wet" when the root zone is actually oxygen-deprived. Trust your finger instead. Let the top layer dry between waterings, and ensure the pot has drainage holes.