Strange Horticulture is a narrative-driven puzzle game that takes place in the quaint town of Undermere. The player assumes the role of a horticulturist and owner of Strange Horticulture, a local plant store. As customers come to the shop, they are thrown into an occult mystery stretching back hundreds of years. To progress through this dark mystery and uncover its secrets, players must successfully identify and collect powerful plants which can then be used to influence events in the story. Along their journey, they also have opportunities to pet cats or join cults as they unravel Undermere's mysteries.