Soil.. I had good yields from my vanilla kush (Barney's farms) and white widow x big bud, the vk was much better smoke I'm looking forward to my cookies kush I'm bout to start I've heard lots of good things about it.. I'm only on my 4th run so still pretty new.. My autos were Heavyweight fast&vast.. And they wasn't fast or vast..lol could have been me tho and I did cut the lights to 12/12 with atleast 3weeks to go so that may have contributed.. I would recommend Herbies for seeds, fast and stealthy great customer service.. Not the greatest freebies but there freebies..lol I actually emailed them and requested an Indica freebie cuz I didn't want the sativa( limited space) and they honored my request..