This is such an easy-to-grow plant. Just dig a post hole about 8 inches deep in the ground, and set the cutting into it. It will grow roots quickly and take off well in the second year.
As the photo shows this Trichocereus spachianus carries the spectacular white and large flowers common to the Trichocereus genus. Bees love these blooms and crawl happily through the pollen filled anthers.