| Coachella Kush | South Bay Genetics | | 60/40 | View variety |
| Coal Creek Kush OG | Scapegoat Genetics | | 60/40 | View variety |
| Coal Creek Kush x Star Dawg | Greenpoint Seeds | | 60/40 | View variety |
| Coal Miner's Cookies | Night Owl Seeds | | 60/40 | View variety |
| Coal Miner’s Daughter | Mandalorian Genetics | | 70/30 | View variety |
| Coast Fork OG | Second Generation Genetics | | 60/40 | View variety |
| Coastal Haze | Coastal Seed Co | | 40/60 | View variety |
| Cob Chem | Cannarado Genetics | | 50/50 | View variety |
| Cobalt Cookies | Enlightened Genetics | | 70/30 | View variety |
| Cobalt Cream (Lithium lineage, Shuga Seeds) | Unknown | | Unavailable | View variety |
| Cobalt Kiwi | Mephisto Genetics | | 50/50 | View variety |
| Cobbler | Tree of Life Seeds | | 50/50 | View variety |
| Cobra | Flash Seeds | | 70/30 | View variety |
| Cobra Chi | Beleaf Cannabis | | 40/60 | View variety |
| Cobra Hai | Sensi Seeds | Durban × GSC Thin Mints x OZ Kush x Lemon Cherry Gelato | 20/80 | View variety |
| Cobra Lips | Bodhi Seeds | | 50/50 | View variety |
| Coca Berries | Swamp Donkey Seeds | | 50/50 | View variety |
| Coca Fields | Swamp Donkey Seeds | | 30/70 | View variety |
| Cochino x Gator Breath | Jungle Boys | | 60/40 | View variety |
| Cock a Cola | No Mercy Supply | | 50/50 | View variety |