Green House Seeds

Netherlands (founded) / Amsterdam (current HQ)

Established in Amsterdam, Green House Seed Co. is an undisputed titan of global cannabis breeding. Founder Arjan Roskam began cultivating exotic landrace sativas and breeding pioneering genetics in the mid-1980s before opening the first Green House Coffee Shop in 1992 and establishing the official seed bank shortly after.

With over 40 High Times Cannabis Cups and dozens of Highlife awards to its name, Green House Seed Co. shaped the modern cannabis landscape. The company is credited with popularizing some of the world's most influential genetics—including the famous "White" family (White Widow, White Rhino) and legendary Hazes (Super Silver Haze, Super Lemon Haze, Hawaiian Snow).

Beyond seed production, Green House Co. expanded its impact on global cannabis culture through the famous Strain Hunters initiative—expeditions led by Roskam and the late Franco Loja to preserve, collect, and document rare landrace strains from remote corners of the globe. Today, Green House Seed Co. offers a diverse catalog of feminized, autoflowering, and CBD-rich seeds backed by decades of proven breeding mastery.