Water Melocactus andinus thoroughly when the soil is completely dry.

During the growing season (spring and summer), water more frequently, but reduce watering significantly in the dormant period (fall and winter) to prevent root rot.

Ensure excellent drainage to avoid waterlogged conditions.

Pruning is generally not required for Melocactus andinus as it maintains a compact, globular form. Remove any dead or damaged parts of the plant using a clean, sharp knife.

The cephalium, where flowers and fruits form, should not be pruned.

Propagate Melocactus andinus primarily through seeds, which require warm temperatures and good drainage to germinate. Stem cuttings are less common but can be taken, allowed to callus for several days, and then planted in well-draining soil.

Repot Melocactus andinus every 2-3 years or when it outgrows its current container. Choose a pot that is only slightly larger than the previous one, with ample drainage holes.

Repotting is best done in spring before the active growth period begins.