Greenhouse Seeds
Greenhouse Seeds is the Amsterdam seed bank behind more Cannabis Cup trophies than anyone can politely count — and we've carried the full catalogue at Azarius since the late '90s. This category covers 70+ feminised and autoflowering strains from Arjan's team, from legends like White Widow and Super Lemon Haze to newer USA-genetics crosses like Skywalker Auto and Tarte Tatin. Buy Greenhouse Seeds direct from stock, shipped across the EU.
Greenhouse Seeds is the Amsterdam seed bank behind more Cannabis Cup trophies than anyone can politely count — and we've carried the full catalogue at Azarius since the late '90s. This category covers 70+ feminised and autoflowering strains from Arjan's team, from legends like White Widow and Super Lemon Haze to newer USA-genetics crosses like Skywalker Auto and Tarte Tatin. Buy Greenhouse Seeds direct from stock, shipped across the EU.
Buy Greenhouse Seeds — The Azarius Guide
Greenhouse Seeds is a Dutch cannabis seed breeder founded in Amsterdam in 1985, best known for winning more High Times Cannabis Cups than any other seed bank on the planet. Their catalogue splits roughly into four camps: classic feminised photoperiods (White Widow, Super Lemon Haze, Jack Herer), autoflowering versions of those classics, USA-genetics crosses (Skywalker OG, Wedding Cake, Gelato lineages), and their own modern hybrids. If you want proven, heavily-worked genetics from a breeder who's been refining them for 40 years, this is the shelf to shop.
Pick Your Format First
Before you get lost in strain names, decide what you're actually growing. The format dictates your timeline, your gear, and how forgiving the grow will be.
| Format | Time from seed | Typical yield | Good for |
|---|---|---|---|
| Autoflowering | 7–10 weeks | 500–800 g/m² | First-time growers, small tents, no light-timer faff |
| Feminised photoperiod | 8–14 weeks flower + veg | 600–900 g/m² | Growers who want maximum yield and control |
| CBD / 1:1 balanced | 8–10 weeks flower | 500–700 g/m² | Buyers wanting balanced cannabinoids, not just THC |
| USA-genetics hybrids | 8–10 weeks flower | 500–750 g/m² | Flavour-chasers — Cookies, Gelato, OG lineages |
If you're new and you want us to just point at something: order Big Bang Autoflowering or Northern Lights Autoflowering. They're forgiving, they finish fast, and they yield more than a beginner has any right to expect.
What We Carry from Greenhouse Seeds
- Classic Cups winners — White Widow, Super Lemon Haze, Super Silver Haze, Jack Herer, Hawaiian Snow, Arjan's Ultra Haze 1. These are the trophies. If you want to grow something with a legacy, start here.
- Heavy yielders — Super Bud, Super Critical, Moby Dick, Big Bang, Himalaya Gold. All push 800 g/m² or more indoors when the environment's right.
- Autoflowering range — Kalashnikova Auto, Sweet Mango Auto, Auto-Bomb, Green-O-Matic, Big Bang Auto, Super Critical Auto, Jack Herer Auto, White Widow Auto, Super Lemon Haze Auto, and more. Seven to ten weeks from seed.
- USA-genetics line — Skywalker Auto, Wonder Pie, Bubba Slush, Velvet Moon, Dark Phoenix, King's Juice, Chemical Bride, Tarte Tatin. Californian flavour brought in-house and stabilised.
- CBD strains — King's Kush CBD, King's Kush Autoflowering CBD, Exodus Cheese Auto CBD. Balanced 1:1 ratios, typically 5–10% of each cannabinoid.
- Mould-resistant outdoor picks — A.M.S. (Anti Mold Strain), Jack's Dream, Ztrawberry, Himalaya Gold. Built for humid European summers and guerrilla plots.
- Kush & Indica-dominant — Bubba Kush, Pure Kush, King's Kush, Sweet Valley Kush, Nori Cake, Banana Krumble. Heavy body, dessert terps, compact growth.
- Modern flavour-led hybrids — Franco's Lemon Cheese, Holy Punch, Kong's Krush, Lemon Orange, Fullgas!, HighCloudZ, AlienZ, Milky Dreams, Persian Pie. Franco Loja's late work plus newer Greenhouse crosses.
How to Choose Your Greenhouse Seeds Strain
Start with your setup, not the strain name. In an 80x80 tent with a single light? Buy something compact — Kalashnikova Autoflowering, Big Bang, Sweet Valley Kush, or Arjan's Haze 3 all stay manageable. Got a 120x120 with proper ventilation and some grow hours behind you? That's when Moby Dick, Super Silver Haze, or Neville's Haze start making sense — they stretch, they take longer, they reward the patience.
Outdoor growers in northern Europe should shop the mould-resistant and cold-tolerant side of the catalogue: A.M.S., Auto-Bomb, Himalaya Gold, and Ztrawberry all handle damp autumn air better than the Haze-heavy sativas. If you're in a warmer southern climate, the Haze family opens up — Super Lemon Haze, Hawaiian Snow, and Arjan's Ultra Haze 1 all thrive with real sun and a long finish window.
For flavour-chasers, the USA-genetics line is where Greenhouse have been putting serious breeding work in recent years. Wonder Pie (Wedding Cake x OG Kush), Bubba Slush (pre-'98 Bubba Kush x Gelato), and Tarte Tatin (Caramel Apple Gelato x King's Tart) are where to start if you want modern Cookies/Gelato terps from a seed bank that actually stabilises its crosses.
When in doubt, order White Widow. It's been in the catalogue since 1995, it's forgiving, it yields well, and it's the strain the rest of the industry measures itself against.
Why Buy Greenhouse Seeds from Azarius
We've been stocking Greenhouse since our first year online in 1999 — we were probably one of the first shops anywhere to list them on the web. The catalogue you see here is the full current range, direct from the breeder, shipped from Amsterdam across the EU. No grey-market restocks, no old genetics sitting in a warehouse. When Greenhouse releases a new hybrid like HighCloudZ or Frosted Guava Auto, it lands on our shelf within weeks.
Frequently Asked Questions
Which Greenhouse Seeds strain is best for beginners?
Start with Big Bang Autoflowering or Northern Lights Autoflowering. Both finish in roughly 9–10 weeks from seed, handle grower mistakes well, and don't need a light-schedule change. If you'd rather a photoperiod, White Widow is the most forgiving of the feminised range.
What's the difference between Greenhouse's autoflowering and feminised seeds?
Autoflowers run on age rather than light cycle — they flower automatically around 3–4 weeks from germination and finish in 7–10 weeks total. Feminised photoperiods need you to switch the lights to 12/12 to trigger flowering, take longer overall, but yield more per plant and let you veg as long as you want.
How many Cannabis Cups has Greenhouse Seeds won?
Over 40 Cups across multiple categories, making them the most-decorated cannabis seed breeder in history. Super Silver Haze alone won three consecutive Cups (1997, 1998, 1999), and Hawaiian Snow has seven to its name. That track record is the main reason we've stocked the brand since 1999.
Are Greenhouse autoflowers smaller than the photoperiod versions?
Yes, noticeably. Most Greenhouse autoflowers finish at 70–120 cm — compare that to feminised photoperiods which can easily push 150–200 cm indoors if you veg them long. Autos are the right pick for small tents, balconies, and any grow where height is a problem.
Do Greenhouse Seeds ship across the EU?
Yes. We ship the full Greenhouse catalogue from Amsterdam across the European Union under free movement of goods. Most orders arrive within 2–5 working days depending on destination.
Which Greenhouse Seeds strain yields the most?
Super Bud and Super Critical both push 800–900 g/m² indoors, with Super Bud reaching a full kilogram per plant outdoors in good conditions. Moby Dick can hit 1,200 g per plant outdoors. These are the heavy hitters — though you'll need proper light, feed, and airflow to actually see those numbers.
Last updated: April 2026
Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.