Origin
Trichocereus terscheckii, also known as the Argentine saguaro, originates from the semi-arid regions of South America, including Argentina, Bolivia, and Peru. This species of cactus was named after the botanist Johann Terscheck, a German-Russian botanist who was part of the early classification of many types of cacti.

Characteristics
Trichocereus terscheckii, a member of the cactus family, belongs to the largest species of cacti in the world, with some specimens reaching up to 10 meters in height. The columnar trunk is green and covered with long, sharp spines that are protrusions from the areolae. The plant's flowers are large, funnel-shaped white blossoms that usually open at night. The Argentine Saguaro also produces fruits, which are inedible for humans but are consumed by some species of birds.

Care
Trichocereus terscheckii requires well-draining soil and full sun to thrive. Although this species of cactus is drought-resistant, it can benefit from regular watering during the summer months. During the winter months, watering is almost stopped to prevent root rot and the plant from freezing. Care also includes annual feeding with a cactus-specific fertiliser to support optimal growth. It's also advisable to place these plants in a location where they are protected from harsh winds, as their height and columnar shape can make them susceptible to toppling over in extreme weather conditions.