Borderliner XTRM ® is one of our best-selling marijuana seeds since its launch in 2013. That year, the connoisseur of the best marijuana strains from Amsterdam Marijuana Seeds, our dear friend and veteran Daan Brinkers, passed away. Brinkers kept the Brazilian Borderliner strain a secret for years. Before he died, he decided to share his precious strain with us and thus with all of you.