Water Brassica montana regularly, especially during its active growth period. Allow the top inch of soil to dry out between waterings.

Reduce watering in cooler months to prevent waterlogged roots, as it prefers consistently moist but not soggy conditions.

Prune Brassica montana to maintain shape and encourage bushier growth. Remove any dead, damaged, or leggy stems as needed. Light pruning in spring can promote new foliage.

Heavy pruning is usually not required unless addressing significant overgrowth.

Propagate Brassica montana from seeds sown in spring or autumn. It can also be propagated by stem cuttings taken in late spring or early summer.

Root cuttings in a well-draining medium and keep them moist and warm until established.

Repot Brassica montana when it becomes root-bound, typically every 2-3 years. Choose a pot one size larger with good drainage. Repot in spring before active growth begins, using a well-draining potting mix.

Handle roots gently during repotting.