What to Do When a Peace Lily Is Frostbitten
Low temperatures in winter often pose a threat of frost damage to peace lilies, which are typical tropical foliage plants highly sensitive to temperature changes. When you notice symptoms such as curled and blackened leaves or soft branches, mastering scientific treatment methods can effectively save the plant. This article explains four key steps with illustrative diagrams to help you quickly perform the rescue.
Four-Step Emergency Response to Frost Damage in Peace Lilies
Temperature Control Strategy
Immediately move the frostbitten plant to a buffered environment of 12-15°C, avoiding direct transfer to a high-temperature room. Use double-layer shade nets for transitional protection, and after three days, gradually increase the temperature to a constant 18-22°C environment. Pay special attention to keeping it away from air conditioner outlets and floor heating, maintaining an environmental humidity of over 60%.
Refined Pruning Treatment
Prune within 48 hours after frost: ① Disinfect pruning shears with alcohol ② Remove completely browned leaves and branches ③ Retain slightly frostbitten semi-woody branches ④ Apply healing ointment to the cuts to prevent infection. Make sure to keep 1/3 of the healthy leaves for photosynthesis.
Scientific Lighting Management
After pruning, use the scattered light rehabilitation method: expose to morning light for 2 hours daily for the first three days, then gradually increase to 6 hours/day. Use a 50% shade net to filter strong light, and rotate the pot to ensure even light exposure. On cloudy or rainy days, use LED plant growth lights as an alternative.
Disease Prevention System
Seven days after frost, spray an 800-fold diluted solution of carbendazim, focusing on the pruned cuts and the surface of the soil. It is recommended to use biological preparations such as Bacillus subtilis to establish dual protection. Spray every 10 days, for a total of three times to form a protective cycle.
By combining temperature gradient recovery, precise pruning, progressive lighting, and systematic antibacterial measures, 90% of frostbitten peace lilies can be revived. For daily care, maintain a temperature of over 15°C at night and regularly apply potassium dihydrogen phosphate to enhance cold resistance. Preventive measures such as wrapping the plant with insulating film are more important than post-event treatment. It is recommended to initiate protective measures when the temperature drops below 10°C.