Oenothera cespitosa, commonly known as Tufted Evening Primrose or Fragrant Evening Primrose, is a perennial herb that is native to a variety of habitats including grasslands, open woodlands, and rocky outcrops in western and central North America. This species often thrives in well-drained soils of prairies, plains, and foothills, preferring open areas where it can receive ample sunlight. It typically forms a low-growing rosette of lobed or toothed leaves and is known for its striking white, four-petaled flowers that bloom at dusk, emitting a pleasant fragrance. These flowers are night-blooming and are pollinated by nocturnal hawkmoths, with the blossoms wilting by the following morning and gradually turning pink as they age. The plant reaches a modest height of 4-12 inches (10-30 cm) and spreads to about the same width.

Tufted Evening Primrose is valued for its evening blooms and fragrance, making it a unique addition to night gardens and moon gardens where its nocturnal flowering can be appreciated. It is also drought-tolerant, making it an excellent choice for xeriscaping and rock gardens. In cultivation, it requires minimal maintenance, thriving in full sun with low to moderate water needs and well-draining sandy or gravelly soils. While it is not commonly afflicted by diseases, overwatering can lead to root rot. Its ability to attract pollinators like the white-lined sphinx moth adds to its ecological value in garden settings.CC BY-SA 4.0