Allow the soil to dry out completely between waterings. Overwatering is the most common cause of rot in Myrtillocactus eichlamii.

Water less frequently during the dormant winter period, providing only enough to prevent severe shriveling. Ensure good drainage to prevent waterlogged roots.

Pruning is generally not required for Myrtillocactus eichlamii unless a specific shape is desired or damaged/diseased parts need removal. If pruning, use a clean, sharp knife or pruners.

Allow cuts to callus over before watering to prevent rot.

Propagate Myrtillocactus eichlamii from stem cuttings. Allow cuttings to dry and callus for a few days before planting in well-draining cactus mix. Roots typically form within a few weeks.

Alternatively, seeds can be sown, but this is a slower process.

Repot Myrtillocactus eichlamii every 2-3 years or when it outgrows its container. Use a well-draining cactus or succulent potting mix.

Choose a pot that is only slightly larger than the current one, and repot in the spring. Handle with care due to spines.