1. Low humidity
Likelihood: HighBoston ferns demand consistently high humidity. Indoor air from heating or air conditioning drops humidity below ideal levels and causes the frond tips to dry and brown while the rest of the frond stays green.
Identification
- remove_circle_outlineCrisp, dry brown tips across many fronds with no yellow banding beneath the brown.
- remove_circle_outlineSoil feels otherwise slightly moist-plant is watered but air is dry.
- remove_circle_outlineOther houseplants nearby also show dry edges or curled leaves.
- remove_circle_outlineHeating vents or drafty windows nearby increase likelihood.
The Fix
- 1Increase ambient humidity: use a humidifier set to 45-60% around the plant for steady results.
- 2Group plants together or place the pot on a tray with wet pebbles so evaporation raises local humidity.
- 3Mist fronds in a pinch but prioritize consistent humidifier use over only misting, which gives a temporary effect.
- 4Move the fern away from heat registers and cold drafts to stabilize moisture loss.
- 5Monitor humidity with a small gauge near the plant and track improvement over 2-4 weeks.