Small-flowered Evening-primrose produces a tall flowering stalk with yellow, four-petaled flowers that open around sunset, making it an especially interesting plant for gardens that are enjoyed in the evening.

The plant can produce large numbers of seeds, allowing it to appear quickly in suitable open ground.
Small-flowered Evening-primrose is self-compatible, meaning an individual plant can produce seed without requiring pollen from another plant.

The plant's tall flower spike can continue producing flowers over an extended period, with individual flowers opening progressively rather than all at once.

Treat it as a naturalizing plant rather than a formal border perennial. Its biennial habit means individual plants don't necessarily return as the same plant every year, but new seedlings can replace them