Water regularly during the growing season, keeping the soil consistently moist but not waterlogged. Reduce watering in drier periods and avoid overwatering, especially in cooler temperatures, to prevent root rot.

Allow the top centimeter of soil to dry out slightly between waterings.

Pruning is typically not necessary for Ballmustard unless aiming to control size or remove spent flower stalks. Deadheading can encourage a tidier appearance and potentially a second flush of blooms.

Remove any diseased or damaged foliage promptly to maintain plant health and vigor.

Ballmustard can be easily propagated from seeds sown directly in the garden in early spring or fall. It also self-seeds readily. For controlled propagation, sow seeds indoors 6-8 weeks before the last frost date.

Transplant seedlings after the danger of frost has passed.

As an annual or short-lived perennial often grown from seed or direct sown, repotting is generally not applicable. If grown in containers, choose pots with adequate drainage and transplant to a slightly larger pot only if root-bound, typically in early spring before significant growth begins.