Water sparingly during the growing season (spring to early autumn), allowing the soil to dry out completely between waterings. Reduce watering significantly in winter, providing only enough to prevent severe shriveling.

Overwatering is the most common cause of root rot in Lophocereus marginatus.

Pruning is generally minimal, primarily for aesthetic shaping or to remove damaged sections. Use a clean, sharp knife or pruning shears to make cuts.

Allow cuts to callus over before exposing the plant to excessive moisture to prevent rot. It can also be pruned to control its impressive height.

Propagate primarily through stem cuttings. Allow cuttings to dry and callus over for several days to weeks before planting in well-draining cactus mix.

Roots will typically form within a few weeks to months in warm conditions with bright, indirect light.

Repot only when necessary, typically every 2-3 years or when the plant outgrows its container. Use a well-draining cactus or succulent potting mix. Choose a pot that is only slightly larger than the current one.

Handle with care due to sharp spines.