Peace Lily $15

A beloved houseplant, peace lilies are renowned for their easy care. The peace lily is hardy, forgiving, and will even let you know when it is thirsty: Just look for the telltale droop. The name is a bit of a misnomer: Peace lilies are not true lilies (plant family Liliaceae), but a member of the Araceae family that also includes colocasia, or elephant ear. Otherwise, in terms of growing and care, peace — as in calm and tranquility — is pretty much what you get.