| Colorz | Perfect Tree | | 60/40 | View variety |
| Colossal Cookies | In House Genetics | | 70/30 | View variety |
| Colossus | ACE Seeds | | 40/60 | View variety |
| Columbian Chem Fruit | GreenFire Genetics | | 50/50 | View variety |
| Columbian Gold | SnowHigh Seeds | | 20/80 | View variety |
| Columbian Haze | Zenseeds | | 50/50 | View variety |
| Columbian Race Fuel | Red Scare Seed Company | | 50/50 | View variety |
| Columbian Red | Dutch Flowers | | 20/80 | View variety |
| Columbian Skies | Dr. Greenthumb | | 40/60 | View variety |
| Columbine | 303 Seeds | | 40/60 | View variety |
| Col’ Cocked | Secret Society Seed Co | | 70/30 | View variety |
| Coma Cookies | Enlightened Genetics | | 60/40 | View variety |
| Coma x Gator Breath | Jungle Boys | | 70/30 | View variety |
| Comatose | Offensive Selections | | 60/40 | View variety |
| Combat Cookies | 2 Guns and a Guy Seed Company | | 70/30 | View variety |
| Comet | Pacific NW Roots | | 80/20 | View variety |
| Comfort Zone | Annunaki Genetics | | 50/50 | View variety |
| Comfortably Dumb | Jinxproof Genetics | | 70/30 | View variety |
| Comfortably Numb | Enlightened Genetics | | 50/50 | View variety |
| Commander Querkle | 2 Guns and a Guy Seed Company | | 60/40 | View variety |