low humidity damage and Boston Fern
Quick answer
If low humidity damage is what's going on with your Boston Fern, the most likely cause is: Dry indoor air below 40% relative humidity causes fern fronds to brown and dry at the edges due to excessive transpiration from delicate leaf tissue. Ferns naturally grow in moist, shaded forest environments where humidity remains above 60%.
Start here:
- 1. Place fern pots on saucers filled with wet pebbles or clay granules to create evaporative humidity around the plant
- 2. Mist fern fronds regularly with tepid, lime-free water, especially during warm periods when air conditioning or heating reduces ambient moisture
Why low humidity damage happens to Boston Fern
Nephrolepis exaltata
Dry indoor air below 40% relative humidity causes fern fronds to brown and dry at the edges due to excessive transpiration from delicate leaf tissue. Ferns naturally grow in moist, shaded forest environments where humidity remains above 60%.
How to correct low humidity damage on Boston Fern
- 1
Place fern pots on saucers filled with wet pebbles or clay granules to create evaporative humidity around the plant
- 2
Mist fern fronds regularly with tepid, lime-free water, especially during warm periods when air conditioning or heating reduces ambient moisture
- 3
Group ferns together to create a microclimate of shared transpiration humidity
- 4
Position ferns away from direct heat sources, radiators, and air vents that accelerate moisture loss
- 5
Use a room humidifier to maintain 50-60% relative humidity in the growing area
Keep low humidity damage from repeating on this Boston Fern
Maintain humidity above 50% year-round by using pebble trays or room humidifiers; never allow ferns to sit in drafty or consistently dry air.