I shall take a stab! at this ID. I love succulents and desert plants! This is gorgeous and I believe it is Agave 'Blue Glow'...thought I'd send this link...Hey, I could be wrongagave and aloe http://myvalleynews.com/homeandgarden/healthy-beautiful-gardens-all-about-agaves-and-aloes/

I would like to take a stab at this ID. I love succulents and desert plants! This is gorgeous and I believe it is Agave 'Blue Glow'... Thought I'd send this link... Hey, but I could be wrong! Agave and Aloe