The breeder behind Serious Seeds, Simon, is responsible for the material sold by the seed bank. He studied biology at one of the universities in Amsterdam and was always a non smoker. (Tabacco, and therefore also marihuana because in Holland it is common practice to mix the latter with tabacco and roll a joint.) He only discovered the merits of smoking pure marihuana after his study  while travelling through Africa in 1986. From that moment on he started collecting seeds. Back in Holland he immediately started growing those seeds out for personal pleasure crossing what he thought were the best plants seemed a natural follow up. Contacts with other growers gave him access to different plants from which he also selected the best ones. The genetic background of this material was not always clear.