Hi David,

Sick Peace Lily Plant

Your plant looks like a Peace Lily (Spathiphyllum). The discoloration on the leaf tips is from too much fertilizerPlants need fertilizer only when they are actively growing. Slow growing plants in low light require very little plant food. Too much fertilizer is worse than not enough. Most plants prefer a water soluble plant food at 1/2 the recommended strength. Plants that are in bloom or dormant should not be fertilized. Houseplant food contains nitrogen (N), phosphorus (P), and potassium (K). A fertilizer containing these elements in equal proportion is considered a balanced plant food. Nitrogen helps in photosynthesis and encourages the growth of leaves and stems. Potassium and phosphorus also help in photosynthesis and aid in root and flower development. Most fertilizers have trace elements of other minerals that are lacking in the soil but are necessary for good plant growth. Fertilizers have a high salt content. If a plant is not producing new leaves and doesn’t absorb the fertilizer, salts build up in the soil. These salts can burn the roots, discolor the leaves, and cause new growth to be small.   or using water that has too much fluoride, chlorine , or salt (from a water softener).  If the soil is moist and you still have drooping leaves, remove them from the plant. The brown and yellow on the leaves of a Peace Lily cannot be trimmed. The leaf just keeps getting brown or yellow along the cut edges. You can read all of my care tips for a Peace Lily in the Popular HousePlant section of the website.

http://www.houseplant411.com/houseplant/peace-lily-spathiphyllum-how-to-grow-care-tips