Central Mexico Pipe Organ (Pachycereus marginatus): A Tall, Columnar Cactus for Living Fences

Central Mexico Pipe Organ, also called Organo or Fence Post Cactus, is a stately, columnar cactus that forms a cluster of unbranched, dark green stems with 5–7 prominent ribs and short, stout spines. It can reach 15–20 feet tall. In spring, it produces white flowers along the ribs, followed by spiny, red fruits. Traditionally used as a living fence in Mexico, it’s a dramatic vertical accent for large, frost-free landscapes.

Taxonomic Profile

Cultivation

Full sun. Well-drained soil. Drought-tolerant. Hardy to 25°F (-4°C) briefly. Plant in rows for a living fence. Slow-growing but long-lived. Imposing silhouette against the sky.