A fragrance-producing light string assembly can be achieved using either a fragrance warmer configured to connect to a conventional light string assembly or a light string assembly having an integrated fragrance warmer. The fragrance warmer is configured to apply heat to a removable and replaceable fragrance pellet that is formed from a polymeric material that is impregnated with a vaporizing agent and configured to emit the vaporizing agent when heated. The fragrance warmer includes a heating element and a heating plate arranged to apply heat to the fragrance pellet using electrical power from the light string assembly.