This is a somewhat slow growing cactus in my environment. It gets water every 1-2 weeks and bright artificial light. The spines are also very soft. I can comfortably touch them unless grabbing tightly to repot. For more information, see this link: http://www.llifle.com/Encyclopedia/CACTI/Family/Cactaceae/6818/Espostoa_guentheri

 

If you want a lower price, I will sever the top to force branching out and save the top for me.