Water regularly during establishment and dry periods, allowing the soil to dry out slightly between waterings. Once established, Centaurea calcitrapa is quite drought-tolerant and prefers drier conditions, so avoid overwatering which can lead to root rot.

Prune after flowering to prevent self-seeding and to maintain a tidy appearance. Remove spent flower stalks at the base.

For plants grown for their foliage or structure, light shaping can be done in early spring before new growth begins.

Centaurea calcitrapa is easily propagated by seed sown in situ in early spring or autumn, or started indoors a few weeks before the last frost. It can also be propagated by root cuttings taken in late winter.

Repotting is generally not necessary for Centaurea calcitrapa as it is often grown as an annual or biennial. If grown in a container, repot in spring to a slightly larger pot if root-bound, using well-draining soil.

Ensure not to disturb the roots excessively.