Water Rough Hawkweed regularly during its growing season, especially in dry conditions. Allow the soil to dry slightly between waterings. Reduce watering in autumn and winter.

Avoid waterlogged soil, which can lead to root rot.

Deadhead spent flower stalks to encourage further blooming and prevent self-seeding if unwanted. Cut back the plant in late autumn to tidy its appearance for winter and remove any diseased foliage.

Rough Hawkweed can be propagated by division of established clumps in early spring or autumn. Seed can also be sown outdoors in autumn or early spring. It readily self-seeds, so manage its spread.

Repotting is generally not necessary for Rough Hawkweed, as it is often grown as a groundcover or in naturalized settings. If grown in containers, repot every 2-3 years in spring if root-bound, using a well-draining potting mix.