Extremely Heat Tolerant, 

Extremely Cold Tolerant(down to 0 degrees), 

Native to Texas & Mexico, 

Very Very Drought Tolerant

Plant using decomposed granite instead of soil.  Plant them just a little high.

Water it in once when when you plant it - then don’t water again - ever (chuckle - really)

Their only issue is when overwatered. 

They can grow up to 10’ tall