Water regularly during the initial growth period, especially in dry conditions. Once established, Squarrose Knapweed is drought-tolerant and prefers drier soil. Avoid overwatering, as this can lead to root rot.

Allow the soil to dry out between waterings for best results.

Deadhead spent flowers to encourage more blooms and prevent self-seeding. Cut back the plant in late autumn or early spring to maintain a tidy appearance and remove any dead or damaged foliage.

This also promotes vigorous new growth for the coming season.

Propagate by seed sown in autumn or early spring, either directly outdoors or in a seed tray. Division of established clumps in early spring is also an effective method.

Ensure good drainage for seeds and divisions to promote successful establishment.

Repotting is generally not necessary for Centaurea triumfettii, as it prefers to be slightly root-bound and dislikes disturbance. If growing in a container and it becomes necessary, repot in early spring before new growth begins, using a well-draining compost mix.