Aglaonema plants, commonly known as Chinese Evergreens, are popular houseplants appreciated for their vibrant foliage. These plants originate from the tropical and subtropical regions of Asia and New Guinea, thriving in warm, humid environments. Their tropical origin makes Aglaonemas particularly susceptible to cold temperatures.
Recognizing Cold Damage
Cold exposure significantly impacts Aglaonemas, with visual signs appearing quickly or over several days. One initial indicator of distress is leaf discoloration, where leaves may turn yellow, brown, or even black if the exposure was severe. Affected leaves might also appear wilted or droopy, losing their usual firmness.
When cold damage is more severe, the leaves can become mushy, translucent, or develop dark, greasy-looking patches. Leaves might also fall off entirely, leaving the plant sparse. Stems may feel soft or mushy, indicating significant tissue damage.
Steps to Recover a Frozen Aglaonema
If your Aglaonema has suffered from cold exposure, immediate and careful intervention can help it recover. First, move the plant to a warmer, more stable environment. Avoid drastic temperature shifts, as sudden changes can further shock the plant. Aim for a consistent temperature range between 65°F and 80°F (18°C to 27°C) for recovery.
Once the plant is in a suitable environment, assess the damage and prune away affected parts. Use clean, sharp scissors or pruning shears to remove any leaves or stems that are visibly mushy, blackened, or severely discolored. Pruning these dead tissues helps the plant redirect energy to healthy areas and prevents potential issues like fungal infections. Wait at least a month before extensive pruning, allowing the plant time to regain energy.
Proper watering is crucial during recovery, but avoid overwatering. Cold-stressed plants may have reduced water uptake, and soggy soil can quickly lead to root rot. Allow the top inch or two of the soil to dry out before watering again. When watering, ensure water drains completely from the pot, and use room-temperature water to prevent shocking the roots.
Aglaonemas thrive in humid conditions. Increase humidity by grouping it with other plants, placing it on a pebble tray, or using a humidifier. Misting leaves every few days also helps.
Recovery is often a slow process, requiring patience. Continue to monitor the plant for new growth or any signs of further decline. Do not fertilize a stressed or recovering plant, as it can burn roots and hinder recovery. Wait for new, healthy growth before applying a diluted fertilizer, typically during spring or summer.
Preventing Cold Damage
Proactive measures are effective in protecting Aglaonema plants from cold temperatures. Maintaining their optimal temperature range is paramount. Temperatures below 60°F (15°C) can cause distress and damage.
Strategic placement indoors is important to shield plants from cold drafts. Keep Aglaonemas away from cold windows, especially in winter, and avoid placing them near exterior doors or air conditioning vents. Ensure they are not hit by cold air from opening doors.
During winter, ensure consistent room temperatures and be mindful of temperature drops, particularly at night. If bringing plants indoors for the winter, do so before nighttime temperatures consistently fall below 50°F (10°C) to ease their transition.
When transporting Aglaonemas, especially in cold weather, take precautions to prevent exposure. Make the plant purchase your last stop, and wrap the plant thoroughly in newspaper or other insulating material before carrying it to a pre-warmed vehicle. Avoid placing plants in car trunks, as these areas can become too cold.