Cold-Damaged Peace Lily: Prune Black Leaves, Boost Humidity

Diagnosis

Black leaves after overnight exposure = cold injury. Peace lilies (Spathiphyllum) are tropical; temps below 55°F cause tissue collapse. Only 7 green leaves remain—plant is severely stressed but alive.

Immediate Care

1. Cut all black leaves: At base; they won't recover and invite rot.
2. Do NOT repot now: Added stress. Wait for active growth.
3. Water sparingly: Only when top inch dry. No saucer water.
4. Maximize humidity: Place in bathroom during showers, or use humidifier/pebble tray. Target 60%+ RH.
5. Bright indirect light: No direct sun while recovering.

Recovery Timeline

• 1–2 weeks: No further decline.
• 3–4 weeks: New leaf emergence from crown.
• 8–12 weeks: Full foliage replacement if roots intact.

Prevention

Never leave peace lilies below 60°F. They're dramatic but resilient if roots survive.

Shower humidity trick works wonders—many growers keep peace lilies in bathrooms year-round.