Water Xerosicyos decaryi sparingly, allowing the soil to dry out completely between waterings. Overwatering is a common cause of root rot.

During the dormant season, significantly reduce watering to prevent waterlogged conditions.

Prune Xerosicyos decaryi to maintain its shape or to remove any dead or damaged stems. Pruning can be done at any time of year, but is best performed after flowering or during periods of active growth to encourage branching.

Propagate Xerosicyos decaryi from stem cuttings. Take cuttings in spring or summer and allow them to callus for a few days before planting in a well-draining medium. Rooting hormone can aid in faster establishment.

Repot Xerosicyos decaryi when it becomes root-bound, typically every 2-3 years. Use a gritty, well-draining potting mix. Repot in spring or early summer, being careful not to disturb the roots excessively.