Boston Fern Turning Brown: Diagnosis and Treatment

Why Boston Fern Fronds Turn Brown

Brown fronds diminish the Boston fern's lush appeal. Causes range from cultural issues to pests. Common culprits include:

• Light – Too much direct sun scorches tips; avoid south-facing windows.
• Temperature – Ideal range: 65°F (18°C) nights, below 95°F (35°C) days.
• Water – Keep soil evenly moist, never soggy or bone-dry.
• Humidity – Low humidity browns edges; use a pebble tray for sustained moisture.
• Salt buildup – Over-fertilizing causes tip burn; flush soil periodically.
• Physical damage – Cat chewing or rough handling browns leaf tips.

Step-by-Step Recovery

Repot with Ideal Mix

Use 50% peat moss, 12% horticultural bark, remainder perlite for excellent drainage.

Fertilize Correctly

Apply half-strength water-soluble fertilizer every 2 weeks (monthly in winter). Twice yearly, water with 2 tbsp Epsom salt per gallon to enhance green color. Always rinse fronds after fertilizing to prevent burn.

Prune Damaged Fronds

Cut browned fronds at soil level to redirect energy to new growth.

With corrected conditions, your fern should regain its vibrant green within weeks.