Carnegia Gigantea - Giant Saguaro Cactus
This is the giant cactus we all know as the big stereotypical one in the westerns!
A native to Mexico, in ideal conditions will grow up to 12m tall or more.
But as this takes up to 150 years or more, and as a slow grower wont take over your space too much!
Keep dry and above 10°C in winter.