Propagating a Tall Columnar Cactus from Cuttings

Rooting 5-Foot Sections of a Mature Cactus

A gardener’s 5–6-foot single-stem cactus (likely Carnegiea, Cereus, Myrtillocactus, or Pachycereus) was frost-damaged at the base, produced two offsets, then leaned. They cut the main stem into five pieces and want to replant.

Identification

Deep-ridged, cucumber-shaped, short spines on ridge tops—consistent with tall columnar cacti. A photo would confirm species.

Propagation Method

• Natural model: These cacti root when they fall over; stem sections touching ground develop roots.
• Faster success: Plant cuttings vertically in pots with cactus soil.
• Watering: Water thoroughly, then let soil dry completely—wait another week before watering again.
• Climate note: In low-rain areas (West TX, NM, AZ, SoCal), plant directly in ground. Elsewhere, pot first.

Handling

Wear thick gloves—spines are formidable. Allow cut ends to callus a few days before planting.