| Cuvee | SubCool’s The Dank | | 60/40 | View variety |
| Cuvee Cookies | Unknown | | 60/40 | View variety |
| CV OG | CannaVenture Seeds | | 70/30 | View variety |
| Cyanide | MassMedicalStrains | | 50/50 | View variety |
| Cyber Cristal | KC Brains Holland | | 100/0 | View variety |
| Cyber Grape | Cannabis Family Seeds | | 60/40 | View variety |
| Cyber Grape x Midnight Express | Cannabis Family Seeds | | 70/30 | View variety |
| Cybertron | Lupos CannaSeed | | 60/40 | View variety |
| Cyclops | Hoku Seed Co | Unknown Strain · [T1] × Ceiba | 50/50 | View variety |
| Cypress Breath | Red Scare Seed Company | | 60/40 | View variety |
| D Cure | Gage Green Genetics | | 60/40 | View variety |
| D DNL | Top Dawg Seeds | | 60/40 | View variety |
| D OG | Top Dawg Seeds | | 60/40 | View variety |
| D&D | Jordan of the Islands | | 60/40 | View variety |
| D'Qar | New420Guy Seeds | | 80/20 | View variety |
| D-Kush | Karma Genetics | | 70/30 | View variety |
| D.K. Won | Dr. Krippling Seeds | | 60/40 | View variety |
| D.P.D. x Chem 91' | Quest Genetics | | 50/50 | View variety |
| D.P.D. x Loompa Headband | Quest Genetics | | 50/50 | View variety |
| D.P.S. | Irie Genetics | | 40/60 | View variety |