Peace lilies (Spathiphyllum species) are attractive indoor foliage plants that produce showy white flowers. They are one of the few foliage plants that will flower in low light. Peace lilies are easy to grow, making them a popular choice for houseplants and one of the top selections of air-purifying indoor plants. Peace lilies will flourish in almost any well-drained potting mix. Soil should be kept moist but not soggy and allowed to dry out slightly between waterings. If the soil is allowed to dry out excessively, the plant will wilt, and the leaves and edges will turn yellow.