| Cash Kushin | Strayfox Gardenz | | 70/30 | View variety |
| Cashew Kush | Sensi Seeds | | 50/50 | View variety |
| Casper OG | Archive Seed Bank | | 70/30 | View variety |
| Cassava Connection | Heart & Soil Seeds | | 0/100 | View variety |
| Cassidy | Top Dawg Seeds | | 50/50 | View variety |
| Cassis Automatic | Sensi Seeds | | 80/20 | View variety |
| Cassius | Stoney Girl Gardens | | 50/50 | View variety |
| Castle Rock Cherries | Unknown | | 50/50 | View variety |
| Cat Dog | Lost River Seeds | | 80/20 | View variety |
| Cat Piss Canyon | Elev8 Seeds | | 40/60 | View variety |
| Cat Piss x Star Dawg | Greenpoint Seeds | | 40/60 | View variety |
| Catahoula | Lucky Dog Seed Co | | 70/30 | View variety |
| Catalina Wine Mixer | Greenpoint Seeds | | 70/30 | View variety |
| Catalyst | Keys to the Kingdom | | 60/40 | View variety |
| Cataract 2.0 | Exclusive Seeds | | 60/40 | View variety |
| Cataract Cake | DNA Genetics Seeds | | 70/30 | View variety |
| Cataract Kush | DNA Genetics Seeds | | 60/40 | View variety |
| Category 5 | Offensive Selections | | 60/40 | View variety |
| Category Z | Offensive Selections | | 60/40 | View variety |
| Cathedral Kush | Night Owl Seeds | | 70/30 | View variety |