Classic giant cactus from the American Southwest. Slow growing. Will grow their first arm around 75-100 years old and can live 150-200 years. Some populations hardy to 15F if dry in winter.
“It can take 10 years for a saguaro cactus to reach 1 inch in height. By 70 years of age, a saguaro cactus can reach 6 and a half feet tall, and will finally start to produce their first flowers. By 95-100 years in age, a saguaro cactus can reach a height of 15-16 feet, and could start to produce its first arm.”