Water Myrtle Spurge sparingly, allowing the soil to dry out completely between waterings. Overwatering is the most common cause of root rot.

In drier climates, occasional watering may be needed during extended dry spells, but drought tolerance is high once established.

Prune Myrtle Spurge primarily for shaping or to remove dead or damaged stems. Deadheading after flowering can improve appearance. If plants become leggy, cut them back by about one-third to encourage bushier growth.

Pruning can be done in late spring after flowering.

Propagate Myrtle Spurge from stem cuttings taken in late spring or early summer. Allow the cuttings to callus for a few days before planting in a well-draining medium.

Alternatively, it readily self-seeds, and new plants can be transplanted from where they naturally appear.

Repotting is rarely necessary for Myrtle Spurge, as it prefers to be slightly root-bound and thrives in well-drained, lean soil. If it becomes necessary, perhaps for larger specimens or if the pot is too small, repot in spring using a gritty, fast-draining cactus or succulent mix.