Water sparingly during the growing season, allowing the soil to dry out completely between waterings. Reduce watering significantly in winter to prevent root rot.

Overwatering is the most common cause of failure with this species.

Pruning is generally not required for Turbinicarpus alonsoi. Remove any dead or damaged parts carefully with a clean, sharp knife or scissors to prevent disease. The plant maintains its natural compact form.

Propagation is typically done by seed. Sow seeds in a well-draining cactus mix in spring or summer. Cuttings are rarely successful due to the plant's clumping habit and susceptibility to rot.

Repot young plants annually or every two years, and mature plants less frequently, in spring. Use a gritty, well-draining cactus soil mix.

Choose a pot that is only slightly larger than the root ball to avoid excess moisture retention.