| Royal Queen Seeds ↗ | Spain, Netherlands | 78 | Athens Cannabis Expo, BALKANNABIS EXPO, CB Expo, Canapa Mundi +15 | 2026 |
| Sweet Seeds ↗ | Spain, Netherlands | 77 | 4.20 Hemp Fest, Athens Cannabis Expo, BALKANNABIS EXPO, Canapa Mundi +13 | 2025 |
| Green House Seeds ↗ | Netherlands | 78 | BALKANNABIS EXPO, Canapa Mundi, Canapa in Mostra, CannaTrade +12 | 2026 |
| Sensi Seeds ↗ | Netherlands | 83 | CB Expo, Canapa Mundi, CannaBusiness, CannaDouro +12 | 2026 |
| Barney's Farm Genetics ↗ | Netherlands | 62 | Athens Cannabis Expo, CB Expo, Canapa Mundi, Canapa in Mostra +13 | 2026 |
| BULK SEED BANK ↗ | Slovenia, United Kingdom | 38 | Athens Cannabis Expo, BALKANNABIS EXPO, Canapa Mundi, Canapa in Mostra +6 | 2026 |
| Kannabia ↗ | Spain | 43 | Canapa Mundi, CannaDouro, Cannafair, Cannafest +8 | 2024 |
| Positronics Seeds ↗ | Spain, United States | 30 | Canapa Mundi, Cannafair, Cannafest, Cultiva Hanfexpo +6 | 2026 |
| Dinafem ↗ | Spain | 49 | 4.20 Hemp Fest, Canapa Mundi, Canapa in Mostra, Cannabizz Warsaw +11 | 2020 |
| Blimburn Seeds ↗ | Spain | 24 | BALKANNABIS EXPO, Canapa Mundi, Cannafest, Cultiva Hanfexpo +6 | 2026 |
| Super Strains Seeds ↗ | Netherlands | 29 | Cannabis Liberation Day, Cannafair, Cannafest, Cultiva Hanfexpo +4 | 2025 |
| BULLDOG AMSTERDAM ↗ | Netherlands | 36 | Athens Cannabis Expo, Canapa Mundi, Cannabis Liberation Day, Cannafair +8 | 2026 |
| City Seeds Bank ↗ | Netherlands, Spain | 21 | 4.20 Hemp Fest, Canapa Mundi, Canapa in Mostra, Cannabis XXL +5 | 2025 |
| Seedsman ↗ | Spain, United Kingdom | 24 | Athens Cannabis Expo, BALKANNABIS EXPO, Canapa in Mostra, CannaTrade +8 | 2026 |
| Exotic Seeds ↗ | Netherlands, Ireland | 13 | Canapa Mundi, Canapa in Mostra, Cannabis Liberation Day, Cannafest +3 | 2018 |
| Bomb Seeds ↗ | United Kingdom, Netherlands | 7 | Cannafest, North Grow, Product Earth | 2019 |
| Humboldt Seed Organization ↗ | Austria, United States | 9 | Expogrow, Product Earth, Spannabis | 2023 |
| The Attitude Inc. | United Kingdom | 4 | Product Earth, Spannabis | 2023 |
| Hemp Passion ↗ | United Kingdom, Spain | 18 | Canapa Mundi, Canapa in Mostra, Cannafest, Cultiva Hanfexpo +5 | 2019 |
| 710 Genetics ↗ | United Kingdom | 5 | Canapa in Mostra, Product Earth | 2019 |
| Dank Genetics ↗ | United Kingdom | 3 | Product Earth | 2019 |
| Lady Sativa Genetics | United Kingdom | 3 | Product Earth | 2017 |
| London Seed Centre | United Kingdom | 2 | Product Earth | 2017 |
| Plantformers | Netherlands | 2 | Cannafest, Product Earth | 2016 |
| Gypsy King Seeds | United Kingdom | 2 | Product Earth | 2016 |
| Amsterdam Seed Centre | — | 1 | Product Earth | 2017 |
| Cali Kings | United States | 1 | Product Earth | 2016 |
| Choice Seedbank ↗ | United Kingdom | 1 | Product Earth | 2016 |
| DINAFEM - HEADLINE SPONSOR | — | 1 | Product Earth | 2017 |
| Dr. Chronic | United Kingdom | 1 | Product Earth | 2016 |
| Freedom Seeds ↗ | United Kingdom | 1 | Product Earth | 2016 |
| Frosted Dank Genetics | United Kingdom | 1 | Product Earth | 2016 |
| Gunjah Seeds | Czechia | 1 | Product Earth | 2016 |
| Humboldt Seed Organisation - HEADLINE SPONSOR | — | 1 | Product Earth | 2017 |
| In House Genetics | — | 1 | Product Earth | 2017 |
| Stealth Seedbank | United Kingdom | 1 | Product Earth | 2016 |
| Sweet Seeds - MAIN SPONSOR | — | 1 | Product Earth | 2017 |
| The Attitude Seedbank - MUSIC VILLAGE SPONSOR | — | 1 | Product Earth | 2017 |
| The Bulldog Seed Co. | — | 1 | Product Earth | 2017 |