Location: California, USA

Based in the heartland of the Californian cannabis-cultivation region, Humboldt Seed Organisation produce high-quality seeds for medical marijuana use. They work to organic standards, ensuring that their business is sustainable and ecologically-friendly, with local suppliers and comprehensive waste recycling to minimise their carbon footprint.

Humboldt's top sellers include Trainwreck, Chemdawg, and the autoflowering Lemon Juice Express.