The Peace Lily, Spathiphyllum is a striking plant when used in a massed display. They bloom in the spring with long-lasting flowers that hover gracefully over the leaves on thin stalks, although they can be forced to bloom in the fall or winter. A very well-grown Peace Lily may bloom twice a year, resulting in several months of flowers. All spathiphyllum are vulnerable to bugs including aphids, mites and scale, as well as root rot if they are allowed to sit in water. Curled, pale leaves generally indicate too much light. Scorched leaves indicate direct sun. Plants that are not properly fertilized may fail to bloom.