Trichocereus candicans

Trichocereus candicans has been reclassified under the genus Echinopsis in modern botanical taxonomy, reflecting taxonomic revisions that merged the Trichocereus genus into Echinopsis. Many growers and horticulturists still use the older Trichocereus name, and the plant is commonly found under both designations in nurseries and cactus collections.

Trichocereus candicans is native to Argentina, where it grows in rocky, arid environments. It is a robust, clustering columnar cactus that forms groups of thick, upright stems armed with prominent golden spines.

Trichocereus candicans produces large, white, trumpet-shaped nocturnal flowers that typically bloom during the summer months. These flowers open at night and can be quite large relative to the plant's stems, reflecting adaptation to pollination by nocturnal moths or bats.

Trichocereus candicans requires well-draining soil, full sun, and minimal watering, consistent with its native Argentine desert habitat. It is relatively cold-tolerant for a columnar cactus but should be protected from prolonged freezing, making it suitable for dry, warm-climate gardens or as a container plant that can be moved indoors in winter.