Pot Size: 1 gal
Accepted Scientific Name:
Trichocereus tarijensis var. poco
Origin and Habitat:
Trichocereus tarijensis var. poco is native to the high-altitude regions of southern Bolivia and northern Argentina, particularly in the Tarija Department and surrounding areas of the Andes Mountains. This cactus grows on rocky slopes and open grasslands at elevations between 2,000 and 3,500 meters, where it endures intense solar radiation, strong winds, and wide diurnal temperature variations. The habitat is semi-arid with well-draining soils, supporting sparse vegetation. These extreme conditions have led to the development of this cactus's thick epidermis and dense spination for protection and moisture conservation.
Description:
Trichocereus tarijensis var. poco is a robust, columnar cactus that reaches 4–6 feet (48–72 inches) in height and up to 10 inches in diameter. It features multiple vertical ribs lined with dense, golden to reddish-brown spines that can grow up to 3 inches long. The stem color ranges from green to bluish-green, often hidden beneath a heavy armor of spines. In summer, it produces large, funnel-shaped flowers that are white to pale pink, typically opening at night and measuring up to 6 inches across. These striking blooms emerge near the apex of mature stems.
Cultivation:
Zone: Hardy in USDA Zones 8–11, with protection from excessive winter moisture.
Temperature: Best grown in temperatures between 10–30°C; tolerates brief drops to -6°C when dry.
Growth Rate: Slow to moderate, depending on warmth and light.
Soil: Requires well-draining cactus mix enriched with pumice for optimal root health.
Watering: Water deeply during active growth but allow soil to dry completely between waterings. Keep dry in winter.
Fertilizing: Feed every 2–3 weeks with a diluted cactus fertilizer during spring and summer.
Light: Requires full sun to maintain compact, healthy growth and vibrant spine coloration.
Pests and Diseases: Relatively pest-resistant but may be affected by mealybugs or rot in poor drainage conditions.
Propagation:
Primarily propagated by seed due to its columnar structure. Sow in a well-draining, pumice-rich substrate and maintain warmth and light moisture until germination. Germination may take several weeks.
