Water Erysimum scoparium moderately during its active growth period, ensuring the soil dries slightly between waterings. Reduce watering significantly in winter to prevent root rot.

Established plants are drought-tolerant, so overwatering is the most common mistake. Aim for well-draining soil.

Prune Erysimum scoparium lightly after flowering to maintain its shape and encourage bushier growth. Remove spent flower stalks to prevent self-seeding if not desired.

Harder pruning can be done in early spring to remove any dead or damaged wood and to shape the plant.

Propagate Erysimum scoparium from seed sown in spring, or from semi-hardwood cuttings taken in summer. Seeds require cool, moist conditions and may benefit from stratification.

Cuttings should be rooted in a well-draining medium, kept humid, and protected from direct sun.

Repot young Erysimum scoparium plants annually or as needed when root-bound, preferably in spring. Use a well-draining potting mix, such as a cactus or succulent blend.

Mature plants generally prefer to be slightly root-bound and may not require frequent repotting.