This study explored the roots and cultivation of the imaginative capacity, focusing primarily on 6 prose writers. Following prior research in categorizing the imaginative capacity in three types—the initiating, conceptual, and transforming imagination—we conducted in-depth interviews with six renowned prose writers in Taiwan. The results unraveled six roots and five cultivation methods as sources of initiating imagination, three roots and five cultivation methods for conceptual imagination, and four roots and five cultivation methods for transforming imagination. The findings of the present study could inspire those engaged in or working toward a career in literacy creation, enrich literacy and communication education by realizing professional writers’ imaginative capacities, and deepen the theoretical foundations and practices of literacy creation.