Water sparingly, allowing the soil to dry out completely between waterings. Overwatering is the most common cause of rot. Reduce watering significantly during winter dormancy.

Ensure excellent drainage to prevent waterlogged roots, which can be detrimental to this succulent species.

Pruning is generally not required for Alluaudia montagnacii unless to remove dead or damaged branches. If shaping is desired, do so cautiously, as the plant can be brittle.

Use clean, sharp tools to make cuts just above a leaf node or branching point.

Propagation is primarily done through stem cuttings. Allow cuttings to callus over for several days before planting in well-draining soil.

Rooting can be slow, and success is best achieved during the active growing season with bottom heat.

Repot only when necessary, typically every 2-3 years, or when the plant becomes root-bound. Use a very gritty, well-draining potting mix, such as a cactus or succulent blend.

Repot in spring before the active growing season begins to minimize stress.