Trichocereus terscheckii is also called the "Argentine Saguaro." This is a tall, ribbed, branching cactus that blooms in the early summer with large white flowers. It has bluish-green stems and yellowish spines.
Light: Full sun
Hardiness: 15-20 degrees Fahrenheit
Excellent specimen plant. Grow with agaves and other highly drought-tolerant succulents.