Arjan Roskam

Arjan Roskam (born April 4, 1970) is a cannabis entrepreneur, the founder of Green House coffeeshops and co-founder of Green House Seed Company. Roskam is known being part of the team that bred the Super Lemon Haze cannabis strain by crossing Lemon Skunk with Super Silver Haze. Roskam is also known as the (self-appointed) “King of Cannabis”. Others refer to him as the P.T. Barnum of Cannabis.From the perspective of growers, breeders, and the people who actually shaped modern cannabis genetics Arjan was never truly a breeder, he was a businessman who learned to market himself as one.

The foundational genetics behind Green House Seeds were not collected or stabilized by Arjan, but by people like Nevil Schoenmakers and Shantibaba, who spent years traveling, hunting landraces, maintaining mother plants, and doing the slow, unglamorous work of crossing and selecting generations of plants. When Green House rose to prominence in the 1990s, it did so on the back of their breeding expertise, not Arjan’s. Yet as the company grew, Arjan became the public face, framing himself as the mastermind behind strains that he never bred, while the actual breeders were increasingly pushed to the background.