Green House Seed Co. – Legendary Cannabis Breeder and Global Leader in Award-Winning Genetics
Green House Seed Co. is one of the most influential and widely recognized cannabis seed companies in the world, with roots dating back to 1985 in Amsterdam. Founded by Arjan Roskam—often referred to as the “King of Cannabis”—the company has built a global reputation for producing award-winning cannabis genetics, pioneering international strain hunting, and advancing modern breeding techniques while preserving rare landrace varieties.
Over decades of operation, Green House Seed Co. has evolved from a single coffeeshop into a multi-faceted cannabis brand, encompassing seed production, global genetic exploration, and educational media through projects like Strain Hunters. Its genetics are the result of long-term breeding programs that combine traditional selection methods with modern hybrid development.
Origins and Global Genetic Exploration
The foundation of Green House Seed Co. is deeply tied to global cannabis exploration. For over 25 years, Arjan and his team have traveled across regions such as Asia, Africa, and South America to collect, preserve, and study landrace cannabis genetics.
These expeditions—documented through the Strain Hunters project—have played a major role in sourcing rare and region-specific cannabis varieties. The collected genetics form the backbone of many of the company’s breeding projects, helping maintain biodiversity while introducing unique traits into modern hybrids.
This long-term commitment to genetic preservation has positioned Green House Seed Co. as one of the few breeders actively bridging heritage cannabis strains with contemporary breeding innovation.
Breeding Philosophy and Genetic Development
Green House Seed Co. focuses on intensive, multi-generational breeding to develop stable, high-performing cannabis strains with distinctive terpene profiles and consistent growth traits. All seeds are produced without genetic modification and are not chemically treated, reflecting a traditional approach to cannabis breeding.
The company’s breeding strategy combines phenotype selection, clone preservation, and cannabinoid profiling to refine cultivars for both recreational and medicinal use. Its catalog includes a wide range of genetics designed to perform across indoor and outdoor environments.
- Integration of landrace genetics into modern hybrids
- Selection for terpene complexity, potency, and yield
- Stable seed production through repeated breeding cycles
- Development of feminized, autoflower, and CBD-rich varieties
Iconic Strains and Cultivation Performance
Green House Seed Co. is responsible for some of the most iconic cannabis strains ever developed, many of which have become global benchmarks in the industry. These cultivars are widely recognized for their performance, resin production, and unique effects.
Among the most notable strains are Super Lemon Haze, White Widow, Super Silver Haze, Great White Shark, King’s Kush, and Himalaya Gold. These genetics span a wide range of cultivation styles, from high-yield outdoor plants adapted to challenging climates to resin-heavy indoor varieties suited for controlled environments.
For example, Himalaya Gold is known for its resilience in outdoor conditions, particularly in cooler or mountainous regions, while strains from the “white family” such as White Rhino and Great White Shark are often favored for indoor cultivation due to their compact structure and heavy resin production.
Awards and Industry Recognition
Green House Seed Co. is widely regarded as the most awarded cannabis seed company in history. The brand has accumulated more than 40 High Times Cannabis Cup titles, along with numerous Highlife Cups and international awards across multiple categories.
These accolades span decades and reflect consistent recognition for excellence in flower quality, hash production, and overall breeding achievement. The company’s success in competitions has played a major role in establishing its global reputation.
Strain Hunters and Cultural Impact
Beyond breeding, Green House Seed Co. has had a significant cultural impact through the Strain Hunters project, which documents cannabis genetics, cultivation practices, and cultural traditions from around the world. This initiative has helped bring awareness to the importance of preserving landrace strains and has introduced a broader audience to the diversity of cannabis genetics.
The company has also been active in advocacy and education, contributing to the normalization of cannabis use and supporting global conversations around legalization and responsible cultivation.
Global Presence and Legacy
From its headquarters in Amsterdam, Green House Seed Co. has expanded into a global operation with multiple cannabis-related ventures, including coffeeshops, seed banks, and collaborative projects across different countries. Its influence extends across both the commercial and cultural sides of the cannabis industry.
Despite decades of growth, the company continues to focus on its original mission: sourcing, preserving, and improving the world’s best cannabis genetics while helping growers select the right strains for their specific environments and goals.
With a legacy built on exploration, innovation, and award-winning performance, Green House Seed Co. remains one of the most important and enduring names in modern cannabis breeding.
