Peace LilyGrowth Habit: Peace lilies typically reach 2 4' tall and wide when grown indoors. Light Requirements: Place in a spot that receives bright or moderate indirect light for the best results. Peace lilies are very tolerant of lower light conditions as well. Toxicity: Toxic to both cats and dogs according to ASPCA. General Care: Avoid direct light to prevent leaf burn. Water once a week or once every other week depending on the season.