Born in 2009, Dr. Underground Feminized Seeds brings the best hybrids of the world in feminized version. - Our seeds are 99.9 % feminized seeds. - We use STS to make our seeds because is the best method to do 99,9 % feminized seeds. - We make the seeds in Hydroponics systems because is better to control the differents parameters. - We don´t recommend to our sellers sell the seeds out of the original pack, this is the reason we sell in 2, 4, and 8 seed pack. - Every seeds are sold in their original pack. - Our strains was tested in differents grow systems, and every are aviable in all grow systems.