How to Distinguish the Main Species of Trichocereus in Cultivation

One of the most frequently asked questions we receive at our specialized nursery in Trichocereus is how to distinguish between the three main species. Although they share many characteristics, there are clear differences that allow for proper identification for correct cultivation and management.

Characteristics of Trichocereus pachanoi (San Pedro)

• Ribs: 6-8, shallow and rounded
• Spines: Short or absent in many varieties
• Color: Bright bluish green
• Growth: Fast, up to 30 cm per year
• Areoles: Small, regularly spaced

Characteristics of Trichocereus peruvianus (Peruvian Torch)

• Ribs: 6-8, deeper and more angular
• Spines: Long and prominent, up to 4 cm
• Color: Grayish green with bluish hues
• Growth: Moderate to fast
• Areoles: Large, with abundant wool

Characteristics of Trichocereus bridgesii (Achuma)

• Ribs: 4-8, very deep
• Spines: Variable, from short to long
• Color: Dark green
• Growth: Fast
• Areoles: Large with brown wool
• Unique feature: Sections that narrow and widen

Summary to Identify Trichocereus Species

If the cactus has few spines and a bluish color, it is probably a Trichocereus pachanoi. If it has long and prominent spines, it is a Trichocereus peruvianus. If the ribs are very deep and the color is dark green with variable sections, it is a Trichocereus bridgesii.