The Peace Lily (Spathiphyllum spp.) thrives in moderate temperatures typical of indoor environments. The optimal temperature range for this plant is between 65°F (18°C) and 85°F (29°C). Temperatures below 60°F (15°C) can slow growth and cause stress, while exposure to temperatures above 90°F (32°C) may lead to leaf scorching or wilting. Avoid placing the plant near drafts, air conditioning vents, or heating sources, as sudden temperature fluctuations can harm its health.
Peace Lilies are native to tropical rainforests, so they prefer high humidity levels of 50% or higher. In dry indoor environments (especially during winter), humidity levels may drop below 40%, which can cause leaf browning or curling. To maintain adequate humidity, consider using a humidifier, placing the plant on a pebble tray with water, or grouping it with other humidity-loving plants. Misting the leaves occasionally can also help, but avoid overdoing it to prevent fungal issues.
During summer, ensure the Peace Lily is shielded from direct sunlight and extreme heat. If indoor temperatures rise, increase humidity to compensate. In winter, move the plant away from cold windows and reduce watering slightly, as lower light and cooler temperatures slow its metabolism. Use a room humidifier to counteract dry air from heating systems.
Watch for these indicators of improper conditions:
To keep your Peace Lily healthy:
