Compare Cannabis Seed Banks & Breeders

UK (founded) / Spain (current HQ)

Garden Of Green

Established over a decade ago by a collective of passionate European geneticists, Garden of Green was created with a mission to breed top-tier medicinal and recreational cannabis strains using strictly organic farming methods. The team focuses heavily on selecting parent plants with superior cannabinoid density, robust stress tolerance, and pronounced terpene expressions. Garden of Green has built an international reputation by combining classic European landraces and staples with popular, high-potency West Coast US "Cali" lines. Their catalog offers photoperiod feminized strains, rapid autoflowers, and specialized high-CBD varieties engineered to assist medical patients and craft growers alike. Standout varieties in their catalog include fan favorites like Amnesia Lemon Kush, Girl Scout Cookies, Phantom Cookies Domina, Candyland, and Kosher Kush. By focusing on strict quality control, organic reproduction practices, and high germination rates, Garden of Green remains a trusted seed bank for growers seeking rich flavors, heavy resin, and dependable yields.

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Spain (founded)

Genofarm

Established in 2002 in Spain, Genofarm was founded by a dedicated team of agronomists, hemp experts, and master breeders committed to high-level genetic stabilization. With nearly two decades of experience working with diverse landrace lineages and elite clone-only cuts, Genofarm focuses on maximizing cannabinoid purity, plant vigor, and total resin density. Genofarm’s breeding ideology centers on combining strict scientific selection with organic propagation practices. Their extensive library includes balanced high-CBD therapeutic options alongside heavy-hitting photoperiod and automatic varieties reaching well over 25% THC. Strains in their catalog are specifically selected for structural resilience, uniform growth, and bold, exotic aroma profiles that hold strong appeal for both flower enthusiasts and extractors. Their catalog features recognized favorites such as Farm Cheese, Thunderhaze Auto, Golden Berry, Medicandy, and Best Mango. Whether supplying medical patients seeking consistent therapeutic ratios or craft cultivators looking for high-yielding, resin-drenched crops, Genofarm continues to set a high standard for quality and genetic integrity.

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Netherlands (founded)

Growers Choice

The origins of Growers Choice trace back to 1996 in the Netherlands, where a small group of passionate cultivators began experimenting with strain selection and hybridization alongside veteran Dutch breeders. After years of mastering feminization techniques and producing high-grade seeds behind the scenes for established European brands, the team officially launched the Growers Choice label in 2011 to release their own proprietary genetic library. By pairing a deep horticultural background with rigorous pheno-hunting, Growers Choice has built an international reputation for taking world-class West Coast US cultivars and refining them into stable, heavy-yielding seed stock. Their breeding philosophy emphasizes vigor, high THC potential, mold resistance, and exceptional terpene complexity, ensuring top-tier performance for both indoor setups and challenging outdoor climates. Their expansive catalog features popular heavyweights such as Red Banana Berry, Bruce Banner #3, Rainbow Candy, Blue Zushi, and Original Oreoz, alongside an array of high-performing "Double XL" autoflowers. Trusted by commercial operators and home hobbyists alike, Growers Choice remains a leading standard for consistency, potency, and commercial-grade harvests.

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UK (founded) / Spain (current HQ)

Heavyweight Seeds

Founded in 2008, Heavyweight Seeds entered the global market with a clear mission: to craft cannabis genetics that deliver maximum yield without sacrificing high-end potency, flavor, or genetic stability. Recognizing that commercial growers and home hobbyists alike want heavy-duty harvests with knockout strength, Heavyweight’s breeding team focused on stabilizing high-performing, high-THC parent lines. By meticulously crossing landrace genetics, old-school European staples, and high-grade American cultivars, Heavyweight Seeds developed a catalog renowned for heavy bud density, high stress tolerance, and dripping trichome production. Their varieties are built for exceptional performance, offering high resistance to common molds and pests alongside forgiving growth traits. Their legendary lineup includes fan favorites like Fruit Punch, Monster Profit, Green Crack Auto, Wipeout Express, and Dream Machine. Whether for commercial cultivators seeking maximum gram-per-square-meter efficiency or home growers wanting heavy-hitting flower with sweet, complex terpenes, Heavyweight Seeds remains a globally recognized benchmark for big yields and pure strength.

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USA (founded) / Spain (current HQ)

Humboldt Seed Organization

Originating from the world-renowned Emerald Triangle in Northern California, Humboldt Seed Organization (HSO) was formed by an international collective of master breeders, organic farmers, and passion-driven cultivators. Drawing directly from the rich agricultural history and exceptional microclimates of Humboldt County, HSO was built to preserve, refine, and globalize elite California cannabis lines. Humboldt Seed Organization is celebrated for taking legendary, clone-only West Coast cuts and stabilizing them into true-to-type seed lines. By blending traditional organic breeding methods with strict phenotype selection, HSO produces plants known for massive structure, extreme trichome density, and rich, gas-and-fruit-heavy terpene profiles. Their iconic catalog features globally acclaimed staples such as Blue Dream, Green Crack, Amherst Sour Diesel, 707 Headband, and Chocolate Mint OG. Trusted by commercial operators for high gram-per-watt efficiency and home growers for unmistakable dispensary-grade shelf appeal, Humboldt Seed Organization remains an international standard for authentic California genetics.

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Spain (founded)

Kannabia

Rooted in Southern Spain and officially launched in Granada, Kannabia Seed Company has grown into one of Europe's most respected and technologically progressive cannabis seed banks. Driven by a mission to optimize plant stability, pest resistance, and ease of cultivation, Kannabia combines traditional breeding wisdom with strict laboratory testing to serve both medical and recreational growers worldwide. Kannabia is renowned for its vast, carefully stabilized genetic library built from selected international landraces, old-school European classics, and high-potency modern strains. Their catalog spans heavy-yielding photoperiod feminized strains, ultra-fast "Go Fast" varieties, robust autoflowers, and dedicated high-CBD and minor-cannabinoid cultivars. Every line is extensively tested under real-world growing conditions to ensure maximum germination viability and predictable performance. Their impressive lineup features globally recognized strains such as Mataró Blue, Colombian Jack, Kritikal-K, Amnesi-K Lemon, and Indica Cream. Whether catering to novice cultivators looking for forgiving, low-maintenance plants or commercial setups demanding maximum gram-per-square-meter efficiency, Kannabia Seeds remains an international gold standard for consistency and genetic excellence.

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