Aka: Mexican Fence Post Cactus
A columnar cactus know for its graphical white margins. It has small spikes along its ridges — as with most cacti — handle with care.
This cactus can grow very tall when direct plant outdoors, easily taller than a single-story house, although this can take around 100 years or so.
It is often referred to as Mexican Fence Post and is often seen living up to its name grown in landscaping side by side in rows creating a gorgeous (and effective) living wall.
A desert dweller native to Mexico this plant requires full sun and heat to reach its full potential. It can easily manage on its own outdoors directly planted in the ground but can also be grown in a container indoors as long as its high sunlight needs are met.
For indoor cacti — keep watering to a minimum especially in the colder months. Consider choosing a terra cotta pot to wick excess moisture away from the roots, upsizing the container ever so often to provide ample room for growth. A well-draining corse soil specifically for cacti is always a good choice.