Water thoroughly when the soil is completely dry. Reduce watering significantly during the cooler, dormant winter months to prevent root rot.

Ensure excellent drainage to avoid waterlogged conditions, as Cereus jamacaru is susceptible to fungal diseases.

Prune to shape the plant, remove dead or damaged stems, or control its size. Use a sharp, clean knife or saw for larger cuts.

Pruning can be done at any time of year but is best performed in spring or early summer before active growth.

Propagate from stem cuttings. Allow cuttings to callus over for a few days to a week before planting in well-draining soil. Roots will form in several weeks, especially in warm conditions.

This method reliably produces new plants true to the parent.

Repot every 2-3 years, or when the plant becomes root-bound. Use a cactus or succulent potting mix with excellent drainage. Choose a pot slightly larger than the current one.

Repotting is best done in spring before the start of the growing season.