| Clementine | Blim Burn Seeds | | 30/70 | View variety |
| Clementine Kush | Colorado Seed Inc. | | 50/50 | View variety |
| Clementine Kush #1 BX | Colorado Seed Inc. | | 60/40 | View variety |
| Clementine Slush | The Cali Connection | | 60/40 | View variety |
| Clementine x Tripoli Wicked | Madd Farmer Genetics | | 60/40 | View variety |
| Clemonadez | Terp Hogz | | 70/30 | View variety |
| Cletus | Irie Genetics | | 70/30 | View variety |
| Cliff Area | Cult Classics Seeds | | 60/40 | View variety |
| Clifford | Crockett Family Farms | | 50/50 | View variety |
| Clifton Shoes (Raspberry Shoes lineage, 7 East Genetics) | Unknown | | Unavailable | View variety |
| Clifton Shoes (Roundhouse lineage, 7 East Genetics) | Unknown | | Unavailable | View variety |
| Climax Autoflower | CH9 Female Seeds | | 50/50 | View variety |
| Clinical White CBD | Expert Seeds | | 20/80 | View variety |
| Clockwork Blood | Riot Seeds | | 40/60 | View variety |
| Clockwork Ghost OG | Riot Seeds | | 60/40 | View variety |
| Clockwork Kush | Riot Seeds | | 70/30 | View variety |
| Clockwork Orange | Riot Seeds | | 50/50 | View variety |
| Clockwork Orange BX | Riot Seeds | | 50/50 | View variety |
| Clockwork Orange BX1 V2 | Riot Seeds | | 50/50 | View variety |
| Clockwork Walker | Riot Seeds | | 50/50 | View variety |