| Jilly Chunk | GreenMan Organic Seeds | | 80/20 | View variety |
| Jilly Glue | MzJill Genetics | | 50/50 | View variety |
| Jilly Pug | Meows Trap Seeds | | 50/50 | View variety |
| Jillybean | MzJill Genetics | | 50/50 | View variety |
| Jimi | Microbe Alchemist | | 60/40 | View variety |
| Jimmie Rustler | Tonygreens Tortured Beans | | 70/30 | View variety |
| Jimmy Haze | Zoolander Seeds | | 30/70 | View variety |
| Jinn | Vancouver Island Seed Company | | 80/20 | View variety |
| Jittu Bhai #7 x Kundoz | Unknown | | 80/20 | View variety |
| Jittu Bhai (Jittu Bhai #7 x Kundoz lineage) | Unknown | | Unavailable | View variety |
| JJ Kush | Cannarado Genetics | | 80/20 | View variety |
| JJ’s Haze | Top Dawg Seeds | | 40/60 | View variety |
| JJ’s Nigerian | Top Dawg Seeds | | 50/50 | View variety |
| JMO | In House Genetics | | 60/40 | View variety |
| Jock Horror | Nirvana Seeds | | 20/80 | View variety |
| Jock Horror | Zenseeds | | 20/80 | View variety |
| Jock Horror Automatic | Nirvana Seeds | | 40/60 | View variety |
| Jocko Graves | 2 Guns and a Guy Seed Company | | 60/40 | View variety |
| Joe Boxer | Thunderfudge | | 70/30 | View variety |
| Joe's Lemonade | Pacific NW Roots | | 60/40 | View variety |