Pot Size: 10"
Accepted Scientific Name: Myrtillocactus geometrizans f. cristata
Origin and Habitat:
Myrtillocactus geometrizans is native to the arid and semi-arid regions of central and northern Mexico, where it grows on rocky hillsides, volcanic slopes, and dry scrublands under intense sunlight. The crested form (f. cristata) is a rare naturally occurring growth mutation in which the growing point elongates into a fan-shaped crest rather than a single stem. This unusual mutation produces intricate sculptural forms that are highly prized by collectors. Like the typical species, the crested form thrives in warm, dry conditions with excellent drainage and abundant light.
Description:
Myrtillocactus geometrizans f. cristata develops spectacular fan-shaped crests composed of undulating blue-green stems with prominent ribs and short gray to black spines. Each specimen forms a unique sculptural pattern, with no two plants displaying exactly the same shape. Depending on age and cultivation, plants may reach 12–36 inches tall and equally wide, gradually producing increasingly elaborate crests over time. Mature specimens may occasionally produce small creamy-white flowers followed by edible dark purple fruits. Its remarkable architectural form and glaucous blue coloration make it one of the most sought-after crested cacti for collectors, containers, and modern succulent displays.
Cultivation
Zone: 9–11
Temperature: 0 to 40°C
Growth Rate: Moderate
Soil: Extremely well-draining cactus soil containing pumice, gravel, and mineral aggregates
Watering: Water thoroughly during active growth, allowing soil to dry completely between watering; reduce watering significantly during winter dormancy
Fertilizing: Every 2–3 weeks during active growth using a diluted balanced fertilizer
Light: Full sun to bright light
Pests and Diseases: Generally resistant; excessive moisture may cause root rot and damage to the crested growth
Propagation:
Propagated almost exclusively by stem cuttings or grafting to preserve the distinctive crested growth habit. Seed-grown plants generally revert to the normal columnar form.
