Oenothera elata subsp. hirsutissima, or Hooker’s Evening Primrose, forms a basal rosette from which a tall flower stalks emerge with yellow blossoms that open in the early morning and in the evening just before sunset. This plant reaches 3-4 ft in height and blooms between June-October. It is found in moist places between 2000-9000 ft. Plant is partial to full shade, wet conditions and transplants well. Plant in clay or silty soils. Palletable to wildlife and a prolific re-seeder in good conditions.
Evening primrose, Oenothera elata