Flora and horticulture have had an outsize influence on the mystery genre: motive, means, opportunity, victims, villains, and detectives. Join Marta McDowell, a writer, gardener, and avid mystery reader, in exploring the many ways in which writers—from Edgar Allen Poe and Wilkie Collins to Agatha Christie and some of today’s top crime fiction authors—have found inspiration in the sinister side of gardening.