Direct Sun
Requires at least 6 hours of direct sun daily; will etiolate in low light.
Brasilicereus phaeacanthus is an endangered, columnar cactus species endemic to Brazil 1. Belonging to the Cactaceae family, this plant develops a shrubby or tree-like growth habit in its native habitat, characterized by its dense spination and nocturnal blooms.
Part of the small genus Brasilicereus, this species was first documented botanically in the early 20th century 2. The specific epithet 'phaeacanthus' derives from the Greek words 'phaios' (dusky/dark) and 'akantha' (spine), referencing the dark, brownish-yellow spines that cover its stems.
This species is restricted to eastern and northeastern Brazil, particularly within the states of Bahia and Minas Gerais 1. It thrives in the seasonally dry tropical biome, specifically in the dry deciduous shrublands known as Caatinga, where it grows on rocky outcrops and sandy soils.
It features slender, erect or semi-sprawling stems that are grayish-green and marked by low ribs. The areoles bear numerous stiff, brownish spines. The nocturnal, tubular flowers are whitish to cream-colored, adapted for pollination by bats and moths during the night 2.
In cultivation, it demands full sun or very bright direct light and a highly mineral, free-draining substrate. Watering should be deep but infrequent during the spring and summer active growth phase. In winter, the soil must be kept completely dry to prevent rot.
Overwatering is the primary cause of failure, quickly leading to root and stem rot 1. Keeping the cactus in damp, cold conditions during winter or exposing it to low-light environments leads to weak, stretched growth (etiolation).
Requires at least 6 hours of direct sun daily; will etiolate in low light.
Water only when the soil is dry. Keep bone dry during winter rest.
Prefers porous, mineral-rich mixes with high grit content to prevent rot.
Equipped with sharp, rigid spines. Keep out of reach of children and pets.
Moderately easy if overwatering is avoided and strong light is provided.
Native to eastern and northeastern Brazil, thriving on rocky slopes and sandy soils within the seasonally dry Caatinga shrublands and dry tropical environments.