Abstract: Seed germination can be effected by a number of environmental factors. Campanula americana, an herbaceous species native to eastern North American, produces seeds that can either germinate in the spring or in the fall. Specifically, most germination seems to occur in the months of April and October. The season of germination determines whether the plant will have an annual or biennial life cycle. This study examined the influence environmental factors including photoperiod, soil type, seed burial depth and wet-dry cycles on the germination of Campanula americana. Photoperiod was found to affect the proportion of seeds that germinated, with the 0-hour photoperiod promoting the lowest levels of germination. It also influenced the timing of germination. Soil type influences both the proportion of seeds that germinated as well as the timing of germination. Wet-dry cycles both reduced the proportion of seeds that germinated and slowed the rate of germination. Burial depth did not affect the proportion of seeds that germinated. It did, however, affect the rate of germination, with seeds at the deepest burial depth germinating the fastest.