The peace lily (Spathiphyllum sp.) is not a true lily, but instead is part of the philodendron family. Peace lilies are rhizomatous perennial plants that are native to parts of South America and Central America. Peace lilies are most commonly grown indoors as houseplants, tolerating low-light conditions and bearing large, shiny green leaves that are 12 inches long and 2 inches wide. The peace lily also produces huge white flowers that can grow to more than 6 inches long.
Place your peace lily in bright, indirect light and away from full, direct sun. If you're growing the peace lily indoors, keep it away from cold drafty areas, as well as heating and air conditioning vents.
Water your peace lily deeply and thoroughly once each week while it's actively growing when rainfall is less than 1 inch. For container-grown peace lilies, water thoroughly two or three times per week to keep the potting soil evenly moist at all times.
Feed your peace lily with an all-purpose perennial flower fertilizer during the spring and summer, according to the instructions on the label. You can feed the peace lily a liquid houseplant fertilizer once each month during spring and summer if the lily is grown indoors.
Mist the peace lily with warm water. Set the container on top of a drainage dish filled with water and pebbles to increase the humidity around the plant.
Treat your peace lily plants for mealybugs by spraying the foliage with an appropriate horticultural oil, insecticide spray or insecticidal soap.