The Old Man Cactus gets its name thanks to the long, white hair-like that stands out of the spiked column that makes up the whole plant. As with most cacti, the Old Man Cactus is one of the easier cactuses to care for. 
 
Not only does this furry cactus with white hair look like an Old Man, but it is also incredibly long-lived. When grown in the wild in their homeland, some of these cacti have been known to live as long as two hundred years and grow to be 20′ feet tall. Cactus experts say the main reason they are able to live for so many years is that their long, soft, white hair protects them from both heat and cold and helps them retain moisture. Although the long white hairs on the top are soft, this cactus must still be handled with care. The shaggy hair covers yellow sharp spines.
 
Size guide:
Mini - 6cm 
Small - 8cm 
Medium - 10cm
Large - 13cm
Extra Large - 15 cm 
 
**Cactus pictured is a medium