Green House Seeds

Pioneers in the search for genetics – the story of Green House Seeds

Green House Seed Company is one of the most awarded and recognizable companies in the cannabis world. It was founded in Amsterdam in 1995 by Arjan Roskam, whose passion for plants took him to far corners of the globe. Together with his partner and friend Franco Loja, he launched the Strain Hunters project, through which they traveled India, Nepal, Africa, South America, and Southeast Asia in search of local landraces. Their mission was to preserve original genetics before they disappeared due to agricultural modernization. These expeditions gave rise to iconic strains such as White Widow, Super Lemon Haze, Neville’s Haze, Cheese, and Trainwreck. The company has won over 40 Cannabis Cup awards across various categories, becoming a benchmark for other breeders.

Breeding philosophy and product range

Green House Seeds focuses on genetic purity and authenticity. Thanks to a collector’s passion for landraces, their strains feature complex terpene profiles and high THC and CBD content. The portfolio includes classic photoperiod seeds (both feminized and regular), fast versions (fast version), autos (in collaboration with other breeders), and dedicated CBD and CBG lines. The catalog is diverse—from heavy indicas to powerful sativas—making it possible to match a strain to individual preferences. The company also regularly published educational videos, allowing both beginner and experienced growers to learn cultivation techniques, especially since Franco Loja passed away in 2017, leaving behind a huge legacy of knowledge.

Tips for growers

Green House Seeds genetics are extensive, but most strains share a few traits: disease resistance, intense aroma, and high yields. When choosing the right strain, pay attention to climate requirements—some, like Super Lemon Haze, prefer warm and dry conditions, while White Widow tolerates cooler weather better. Large sativa plants such as Neville’s Haze require plenty of space and a longer flowering phase (12–14 weeks), making them ideal for a greenhouse or outdoor cultivation. Indicas like Big Bang or King’s Kush, on the other hand, have a short flowering time (8–9 weeks), a compact structure, and are great for indoor setups.

To maximize yields, it’s worth using SoG (Sea of Green) and SCROG (Screen of Green) techniques, and adjusting feeding depending on the strain (sativas generally like less nitrogen during flowering). The company also recommends using carbon filters in grow boxes, as their strains can produce an intense smell. Regular pruning and removing unproductive leaves ensures proper airflow and reduces the risk of mold.

Green House Seeds is a bank that combines a passion for hunting new genetics with professional selection and education. If you want proven, award-winning strains with diverse flavor profiles, this brand is an excellent choice—both for beginners and experienced growers in countries where cultivation is legal.