It has a long history of medicinal uses. Native Americans, for example, used its leaves, roots, and seedpods in preparations for hemorrhoids, bruises, wounds, and skin problems.

Evening primrose oil contains an omega-6 essential fatty acid that is necessary for good health. However, while there is some evidence that taking evening primrose oil supplements may benefit some health conditions, the study results are mixed.

Plant is a biennual. Hardy. Likes full sun.