Water regularly, especially during dry periods, to keep the soil consistently moist but not waterlogged. Allow the top 2-3 cm of soil to dry out slightly between waterings for established plants.

Reduce watering in winter when the plant is dormant.

Deadhead spent flowers regularly to encourage further blooming and maintain a tidy appearance.

Cut back the plant by about one-third in late autumn or early spring to promote vigorous new growth and prevent it from becoming leggy. Remove any dead or damaged stems.

Propagate from seeds sown in autumn or early spring, either directly outdoors or in a cold frame. Division of established clumps is best done in early spring or autumn. Sow seeds at a depth of about 0.

5 cm in well-draining soil.

Knautia arvensis is a perennial that prefers to be left undisturbed once established and generally does not require frequent repotting. If container-grown plants become root-bound, repot in spring into a slightly larger container with fresh, well-draining potting mix.