Yellow evening primrose (Oenothera biennis L) is a sweet little wildflower that does well in almost any part of the United States. As the name suggests, the yellow evening primrose blooms at night and produces lovely yellow flowers from May to July. This biennial will reseed itself wherever you plant it, but it is not very invasive and will remain well behaved in flowerbeds. Plant in full sun to part shade in moist, well-draining soil. Attracts evening pollinators including moths and some bees.
NOTE: Considered toxic to dogs and cats.