Water hawkweed oxtongue regularly, especially during establishment and dry periods. Allow the soil to dry out slightly between waterings. Avoid overwatering, which can lead to root rot.

In hot, dry climates, more frequent watering may be necessary to maintain optimal growth and flowering.

Deadheading spent flowers can encourage a longer blooming period and prevent self-seeding if unwanted. Remove any yellowing or damaged foliage as needed to maintain plant health and appearance.

Occasional trimming can help manage the plant's size and shape, though it is not typically a highly invasive species.

Hawkweed oxtongue is easily propagated by seed sown directly into the garden in early spring or autumn. Seeds germinate readily in well-drained soil.

Division of established clumps in spring is also an effective method, providing a reliable way to increase plant numbers.

As a perennial herb, Picris hieracioides is not typically grown in pots and therefore does not require regular repotting. If container-grown plants become root-bound, they can be transplanted to a larger pot or directly into the ground in spring or autumn, ensuring the root ball is kept intact.