Improper-Light-Temperature on boston fern
What's Happening
Nephrolepis exaltata 'Bostoniensis' suffers when exposed to direct sunlight which scorches fronds, or temperatures below 13°C (55°F) which cause growth cessation and frond yellowing. Native to tropical understories, this fern requires filtered light and stable warmth.
How to Fix It
- 1
Position Boston fern in bright, indirect light - east or north-facing windows are ideal, or 2-3 meters back from south/west windows
- 2
Maintain summer temperatures between 18-24°C (65-75°F) and winter temperatures between 13-16°C (55-61°F)
- 3
Avoid cold drafts from windows, doors, or air conditioning units that can drop temperature below minimum threshold
- 4
Rotate the plant 90 degrees weekly to ensure even light exposure on all fronds
- 5
If fronds begin to pale or yellow, move to slightly brighter location while avoiding direct sun
How to Prevent It
Keep Boston fern in bright, filtered light away from direct sun exposure; maintain temperatures consistently between 13-24°C (55-75°F) year-round without sudden fluctuations.