Blue hash is blueberry and cali hash plant. Dunno about the cross, but cali hash plant grows with few branches, big buds and thick stalks - also finishes really fast.
Dunno about G13 haze, but you might want to look at CH9's super haze.
I have grown Purple Haze in the past. I gotta say it smells just as strong as the skunk. Last purple haze I grew even turned purple on me with 70-80 degree temps.
