Smooth Hawksbeard prefers consistently moist soil, especially when young. Water regularly during dry periods, allowing the top few centimeters of soil to dry out between waterings.

Avoid overwatering, as this can lead to root rot. Established plants are moderately drought-tolerant.

Pruning is usually not necessary for Crepis capillaris, as it is an annual or short-lived perennial. Deadheading spent flower stalks can prevent self-seeding if you wish to control its spread.

Otherwise, allow it to naturalize. Any trimming should be done after flowering.

Crepis capillaris is easily propagated by seed. Sow seeds directly into the garden in early spring or late autumn. They germinate readily in well-prepared soil.

Seeds can also be started indoors a few weeks before the last frost. It readily self-seeds in suitable conditions.

Repotting is not typically applicable as Crepis capillaris is often grown as an annual or allowed to self-seed. If grown in containers and needing to be moved or divided, do so in spring or early autumn.

Handle the roots gently to minimize transplant shock.