Saturday, January 17, 2026

Green House Seed Co: The Empire


Green House Seed Co: The Empire

Greenhouse Seed Co Review


Founded: 1985 Founder: Arjan Roskam ("The King of Cannabis") Location: Amsterdam, Netherlands Specialty: High Times Cup Winners, Strain Hunting, Landrace Hybridization Reputation Tier: S-Class (The Hollywood Blockbuster)

👑 The Executive Summary

If Sensi Seeds is the history book, Green House Seed Co. (GHSC) is the Movie Adaptation.

Founded by the flamboyant Arjan Roskam, Green House is arguably the most commercially successful seed bank in history. Arjan, self-proclaimed "King of Cannabis," turned a small coffee shop operation into a global empire that includes nutrients (Green House Feeding), documentaries (Strain Hunters), and a trophy case holding over 40 High Times Cannabis Cups.

Green House is the definition of "High Visibility." While other breeders hid in basements, Arjan and the late, legendary Franco Loja traveled the world with camera crews, hunting for rare landraces in the Congo, Colombia, and India. They popularized the concept of "Terroir" in cannabis and brought genetics from the jungle directly to the Amsterdam coffee shops.

🧬 The Differentiator: The "Strain Hunters"

Marketing meets preservation.

Green House is unique because it operates two distinct genetic engines: Green House Seed Co. (The Hybrids) and Strain Hunters (The Landraces).

  • The Documentary Effect: Their Strain Hunters film series revolutionized the industry. It showed the world where weed comes from.

  • The Methodology: They locate rare landraces (like the Malawi Gold or Swazi Red) and bring them back to Holland.

  • The Hybridization: Instead of selling raw landraces (which are hard to grow indoors), they cross them with Dutch legends like Skunk or White Widow. The result is a plant that has the exotic "jungle" high but grows with the speed and density of an indoor commercial strain.

🚜 Breeding Methodology: The "Champion" Protocol

Green House breeds for Awards. Their methodology is designed to create "Cup Winners."

  1. Haze Mastery: Arjan is obsessed with Haze. He spent decades refining the long-flowering Sativas of the 70s into plants that could be grown indoors. Super Lemon Haze and Super Silver Haze are the direct results of this obsession.

  2. Feminization Pioneers: Along with Dutch Passion, Green House was one of the first to aggressively push Feminized seeds to the mass market, arguing that hobby growers shouldn't waste space on males.

  3. The US Pivot: Recently, GHSC has aggressively pivoted to American genetics, launching a massive line of crosses involving Gelato, Dosidos, and GMO to stay relevant in the modern era.

🏆 The Strain Catalog (33+ Cultivars)

Green House has a catalog of titans. Below is the authoritative list, categorized by era.

The "Cup Winners" (The Amsterdam Legends)

  1. Super Lemon Haze: Two-time Cup winner. Lemon Skunk x Super Silver Haze. The most famous citrus strain on Earth.

  2. Super Silver Haze: The 90s King. Skunk x Northern Lights x Haze.

  3. White Widow: The resin queen. Brazilian x South Indian. The standard for "White" strains.

  4. Hawaiian Snow: Hawaiian Sativa x Laos. A pure Sativa that tests incredibly high in THC.

  5. Arjan's Haze #1: G13 x Haze. A massive plant with a psychedelic high.

  6. Arjan's Ultra Haze #1: Neville’s Haze x Cambodian x Laos.

  7. Great White Shark: Super Skunk x White Widow. Known as "Peacemaker."

  8. Himalaya Gold: Nepali x North Indian. Massive outdoor yielder, resistant to cold.

  9. El Niño: Haze x Super Skunk x White Widow. A compact, elite bio-mass producer.

  10. The Church: Swiss Sativa x Skunk x Northern Lights. Mold resistant and spiritual.

  11. Big Bang: Skunk x Northern Lights x El Niño. Prescribed in Dutch pharmacies for pain.

  12. Neville's Haze: The most pure Haze on the market. 14+ week flowering time.

The "Strain Hunters" & Tributes

  1. Franco's Lemon Cheese: A tribute to the late Franco Loja. Super Lemon Haze x Exodus Cheese.

  2. Franco's Fullgas!: Exodus Cheese x Sherbert OG. A high-octane tribute.

  3. Damnesia: A.M.S. x Amnesia Haze. A modernized take on the Amsterdam classic.

  4. Money Maker: Master Kush x Hindu Kush x Skunk. Short, bushy, and profitable.

  5. Big Tooth: Afghan x Hawaiian Sativa x Nepalese. Fast flowering and sweet.

  6. Afgooey: Afghan x Maui Haze. A sticky, stone-heavy Indica.

  7. Flowerbomb Kush: Green Crack x OG Kush. Winner of the 2012 Cup.

  8. White Strawberry Skunk: Swiss Erdbeer genetics. Sweet strawberry aroma.

The "USA" & Modern Line (New School)

  1. King's Juice: Mimosa x King's Kush. Floral, citrusy, and purple.

  2. Velvet Moon: Dosidos x Holy Punch. A smooth, creamy night-time strain.

  3. Bubba Slush: Bubba Kush x Gelato. Dark chocolate mixed with coffee.

  4. Chemical Bride: Chemdog x Wedding Cake. No fruit, just gas and cream.

  5. Cloud Walker: Punta Roja (Landrace) x Mendo Breath. A clash of Colombian Sativa and Cali Indica.

  6. Holy Punch: The Church x Grape. Extremely resilient and fruity.

  7. Wonder Pie: Wedding Cake x OG Kush. A commercial yielder with US flavor.

  8. Banana Krumble: Banana Punch x OG Kush. High THC, sedative effects.

  9. Tart Tarts: Caramel Apple Gelato x King's Tart. Dessert terpenes.

  10. Lemon Orange: Super Lemon Haze x Clementine. Citrus overload.

  11. Persian Pie: Lemon Tree x Banana Krumble.

  12. AlienZ: Watermelon Zkittlez x Velvet Moon. A high-yield candy strain.

  13. Super Lemon Haze x GMO: A savory twist on the classic lemon.

The Autos

  1. King's Kush Auto: The autoflowering version of their heavy OG/Grape cross.

  2. Super Lemon Haze Auto: The legend in a 9-week format.

❓ FAQ: Green House Seed Co.

Q: Who was Franco Loja? A: Franco was the "Indiana Jones" of cannabis. He was the head breeder and the face of the Strain Hunters series. He tragically passed away in 2017 from malaria while hunting landraces in the Democratic Republic of Congo. Franco's Lemon Cheese was released to support his family foundation.

Q: Why is Arjan called the "King of Cannabis"? A: It is a self-given title, but backed by stats. He has won more High Times Cannabis Cups than any other individual. He is a polarizing figure—some love his showmanship, others criticize his ego—but his impact on the genetics market is undeniable.

Q: Are their seeds good for beginners? A: Yes. Strains like Big Bang, The Church, and Himalaya Gold were bred specifically to be "unkillable" outdoor plants. They are incredibly resistant to mold and pests.

Q: What is the difference between Green House and Strain Hunters seeds? A: They are the same company. Strain Hunters was originally a separate seed line focusing on landrace hybrids, but today they are sold under the same umbrella.

🏁 The Architect's Verdict

Green House Seed Co. is the Blockbuster. They put cannabis on the big screen.

They are the perfect breeder for the Haze Lover and the Fan. If you grew up watching Strain Hunters on YouTube, growing Super Lemon Haze is a rite of passage. They offer a massive catalog that bridges the gap between the old 90s legends and the new US hype, all with the reliability of a massive corporation.

Score: 9.5/10 Best For: Haze genetics, Outdoor growers, and fans of cannabis history.