Water consistently, especially during dry periods. Allow the soil to dry out slightly between waterings. Avoid overwatering, as this can lead to root rot. In very hot weather, more frequent watering may be necessary.

Prune to remove spent flower stalks and any yellowing or dead foliage. This encourages more continuous blooming and maintains a tidy appearance. Regular deadheading can prevent unwanted self-seeding.

Sonchus tenerrimus readily self-seeds. To propagate intentionally, collect seeds in late summer or fall and sow them outdoors in a prepared bed.

Alternatively, division of established clumps in early spring is also effective.

Repotting is rarely necessary for this plant as it is often treated as an annual or biennial. If growing in a container and it becomes root-bound, repot in early spring into a slightly larger pot with fresh, well-draining potting mix.