Silver Torch Cactus (Cleistocactus hyalacanthus): A Columnar Cactus with Silvery Spines

The Silver Torch Cactus, Cleistocactus hyalacanthus, is a striking columnar cactus native to the high Andes of Bolivia and Argentina. Its dense covering of silvery-white spines gives it a frosted appearance, making it a standout in any cactus collection.

Growth Habit

This species forms clusters of erect, cylindrical stems that can reach 3–6 feet tall and 2–3 inches in diameter. The stems have numerous low ribs lined with closely spaced areoles bearing 20–30 radial spines and a few longer central spines. In summer, mature plants produce tubular, deep red flowers that emerge horizontally from the sides of the stems, followed by small, spherical fruits.

Cultivation Requirements

Silver Torch thrives in full sun and a fast-draining, mineral-based soil. It is adapted to cool, dry winters and can tolerate light frost if kept dry. Water regularly in summer, but reduce drastically in winter. It is an excellent choice for rock gardens, raised beds, or large containers in climates with mild winters.