Hyoscyamus boveanus prefers to dry out slightly between waterings. Allow the top 2-3 cm of soil to become dry before watering thoroughly. Reduce watering significantly during winter dormancy to prevent root rot.

Ensure good drainage to avoid waterlogged conditions, which this species dislikes.

Pruning is generally not required for Hyoscyamus boveanus. If dead or damaged foliage appears, it can be carefully removed at any time.

To encourage bushier growth or to manage size, light pinching back of young stems can be done in spring. Avoid heavy pruning as it can stress the plant.

Hyoscyamus boveanus can be propagated by seed sown in spring. Seeds may benefit from a period of cold stratification. Alternatively, cuttings can be taken in late spring or early summer from healthy stems.

Ensure cuttings are planted in well-draining soil and kept lightly moist.

Repot Hyoscyamus boveanus only when it becomes root-bound, typically every 2-3 years. This is best done in early spring before active growth begins.

Use a well-draining potting mix, such as a cactus or succulent blend, and a pot with drainage holes to prevent water accumulation.