Saguaro Cactus

About this plant

The saguaro is a large, tree-like columnar cactus that can grow to be over 40 feet tall. It is native to the Sonoran Desert and is an iconic symbol of the American Southwest. The saguaro can live for over 150 years and typically begins to branch (grow arms) when it is 50-75 years old.

Photo gallery

Young saguaro in the foothills

A young saguaro growing among desert shrubs with the Tucson mountains in the distance. Notice the smooth, unbranched column shape.

Mature saguaro

An adult saguaro with arms beginning to form. Saguaros typically start to branch when they are 50–75 years old.

Seedling under a nurse plant

A small saguaro growing in the partial shade of another plant, which helps protect it from extreme sun and temperature swings. Based on size, the small saguaro in the photo is likely around 10-20 years old!

Saguaro flower

The saguaro's white, waxy flowers bloom at the top of the stems in late spring. They provide nectar for bats, birds, and insects.

Ribs and spines detail

A close look at the accordion-like ribs and sharp spines that help the saguaro store water and discourage animals from eating it.

Bird nesting cavities

Woodpeckers and other birds carve nesting holes into saguaros. Over time, these heal into hardened structures called saguaro boots.