Water regularly during dry spells, especially when establishing. Allow the soil to dry out slightly between waterings once established. Overwatering can lead to root rot, so ensure good drainage.

In containers, water more frequently as they dry out faster.

Deadhead spent flowers to encourage more blooms and prevent self-seeding if desired. In late autumn or early spring, remove any dead or damaged foliage.

Cut back flowering stems after they have finished blooming to maintain a tidy appearance and encourage a longer flowering period.

Easily propagated by seeds sown directly outdoors in autumn or early spring. For more controlled propagation, sow seeds indoors about 6-8 weeks before the last frost.

Division of established clumps in spring or autumn is also an effective method.

Container-grown Oenothera parviflora may need repotting every 2-3 years to prevent overcrowding and replenish the soil. Choose a pot with good drainage and fresh, well-draining potting mix.

Repot in spring before new growth begins to minimize transplant shock.