Green House Seed Co. has been one of Amsterdam's best-known seed companies since the 1990s under Arjan Roskam, with a trophy cabinet of Cannabis Cups and strains such as Super Lemon Haze, White Widow and The Church. The range is colour-coded by seed type, and many lines are available as feminised, autoflowering and now fast-flowering versions.
The Greenhouse Seed Co. catalogue in numbers
Express Highs currently stocks 86 Greenhouse Seed Co. varieties: 86 feminised and 0 regular, of which 26 are autoflowering and 60 photoperiod. 4 carry a medium or high CBD rating. 11 are rated very high THC (25%+).
| Genetic profile | Strains |
|---|---|
| Indica dominant | 38 |
| Indica / Sativa hybrid | 29 |
| Sativa dominant | 18 |
Most popular Greenhouse Seed Co. strains with Express Highs customers
- Auto-Bomb — autoflowering, indica dominant, high THC (16-24%)
- Persian Pie — photoperiod, indica / sativa hybrid, high THC (16-24%)
- White Rhino — photoperiod, indica / sativa hybrid, high THC (16-24%)
- A.M.S. — photoperiod, indica / sativa hybrid, high THC (16-24%)
- Air Lemon (Super Lemon Haze x RS11) — photoperiod, indica dominant, very high THC (25%+)
- Alienz Auto — autoflowering, indica dominant
Which Greenhouse Seed Co. strain to pick
For a quick or outdoor-in-the-north grow, start with the autoflowering lines. The photoperiod varieties give larger plants and bigger harvests indoors or in the Mediterranean south. Each strain page on this site lists flowering time, height and yield with planning notes for European conditions.
Where to buy Greenhouse Seed Co. seeds
The full Greenhouse Seed Co. range at Express Highs ships from EU stock with discreet packaging. Seeds are sold as collectable genetics; germination may not be legal where you live.
Frequently asked questions
How many Greenhouse Seed Co. strains are available?
Express Highs stocks 86 Greenhouse Seed Co. varieties: 86 feminised and 0 regular.
Does Greenhouse Seed Co. make autoflowering seeds?
Yes — 26 of the stocked Greenhouse Seed Co. strains are autoflowering.
Disclaimer
The information provided in this article is intended for informational purposes only and does not constitute medical, legal, pharmaceutical, or professional advice of any kind. Express Highs makes no representations or warranties regarding the accuracy, completeness, or suitability of the content for any particular purpose. Readers should not rely on this content as a substitute for advice from a qualified medical professional, legal counsel, or other relevant expert.
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