Pot Size: 8"
Accepted Scientific Name:
Austrocephalocereus dybowskii
Origin and Habitat:
Austrocephalocereus dybowskii is native to the arid and rocky regions of eastern Brazil, specifically the states of Bahia and Minas Gerais. It inhabits dry, rocky outcrops and scrublands within the Caatinga biome, a region characterized by seasonal drought, intense sunlight, and nutrient-poor soils. This cactus is adapted to survive long dry periods with minimal water and often grows on steep inclines and cliffs. Its native habitat experiences high daytime temperatures and cool nights, with limited rainfall primarily in the summer months.
Description:
Austrocephalocereus dybowskii is a columnar cactus that can reach heights of 12 to 24 inches in cultivation, but grows taller in habitat. Stems are ribbed, cylindrical, and densely covered with long white to golden-yellow spines, giving it a bristly, woolly appearance. Mature specimens often develop a cephalium—a bristly, wool-covered flowering zone at the apex of the stem. Flowers are tubular, white to pale yellow, and nocturnal, emerging from the cephalium. The contrast between the sharp spines and soft wool gives the plant a distinctive look.
Cultivation:
Zone: Suitable for USDA Zones 10–11; grow in pots in cooler zones.
Temperature: Prefers 20–30°C; can tolerate down to 5°C if kept dry.
Growth Rate: Slow to moderate depending on warmth and light.
Soil: Use a cactus soil blend with added pumice for excellent drainage and root aeration.
Watering: Water deeply but infrequently during active growth; allow soil to dry completely between waterings. Keep dry in winter.
Fertilizing: Apply a diluted, low-nitrogen cactus fertilizer every 2–3 weeks during the growing season.
Light: Requires full sun to maintain compact growth and healthy spine development.
Pests and Diseases: Generally resilient but may be affected by mealybugs or rot in overly damp conditions.
Propagation:
Propagation is typically done by seed. Sow in a well-drained, pumice-rich mix and keep warm and lightly moist until germination occurs. Germination may take several weeks.
