Phyllis Hogan is a respected Southwest herbalist and the founder of Winter Sun Trading Company, established in Flagstaff, Arizona, in 1976. For nearly five decades, she has dedicated her work to preserving the rich traditions of Southwest herbalism while building one of the region's most trusted sources for organic herbs, handcrafted tinctures, and authentic Native American art.

In 1983, Phyllis co-founded the Arizona Ethnobotanical Research Association (AERA), a nonprofit organization committed to documenting and preserving traditional plant knowledge throughout the Southwest. Her work has earned recognition from the American Herbalists Guild for outstanding contributions to American ethnobotany.

An educator and lecturer, Phyllis has shared her knowledge across the United States and internationally, serving as a keynote speaker at the Lady Bird Johnson Wildflower Center and teaching ethnobotany and traditional plant use in collaboration with the Pima, Hualapai, Havasupai, Hopi, and Navajo communities.