As the name infers, the flowers of this plant open at night. Once the sun starts coming up, the flowers will begin to wilt. By night fall the flowers , Tolerance, Not salt tolerant of inundation by salty or brackish water. Some tolerance to salty wind but not direct salt spray. , Considertions, This species can be weedy. , Wildlife, Bobwhite, mourning dove and gold finches feed on the seeds , Habitat, Cutleaf evening-primrose is found most often in sandy and limerock based soils, and favors disturbed areas. , Did You Know?, Showy flowers Attracts native bees, butterflies and moths.  Especially interesting to native bees.