If you're looking for maximum yields and maximum potency in an autoflowering strain then look no further. 

Fast was the first hurdle for Heavyweight, taking a sturdy white dwarf and crossing it with an auto skunk that would reach its full potential in 7 careful weeks, and then the Vast came when further crossing with a powerful Afghani auto.  Great care has been taken to ensure that the high yields are not at the expense of quality, the long thick buds covered in sparkling crystals produce a high quality soft and sweet smoke with spicy undertones.  The effect is very fast and knock out, leading to a long relaxed stone.  

Don't expect Fast and Vast to perform like any ordinary auto, for this is no ordinary auto, it's a Heavyweight Auto!