| Mamba Negra | Blim Burn Seeds | | 60/40 | View variety |
| Mamba Negra Auto | Blim Burn Seeds | | 50/50 | View variety |
| Mambo MG | Unknown | | 60/40 | View variety |
| Mambo Sauce | Night Owl Seeds | | 60/40 | View variety |
| Mamia | Bask Triangle Farms | | 70/30 | View variety |
| Mamma Hutt | Red Scare Seed Company | | 70/30 | View variety |
| Mamma Mia | Nasha Genetics | | 60/40 | View variety |
| Mammary Loss | Secret Society Seed Co | | 70/30 | View variety |
| Mammoth | The Bank Genetics | | 50/50 | View variety |
| Man o War | Ocean Grown Seeds | | 70/30 | View variety |
| Manar Ghazni | Indian Landrace Exchange | | 100/0 | View variety |
| ManBearAlienCheese | Mephisto Genetics | | 50/50 | View variety |
| ManBearAlienPig | Mephisto Genetics | | 60/40 | View variety |
| Mandala #1 | Mandala Seeds | | 10/90 | View variety |
| Mandala #1 x Nepalese Hash Plant | Centennial Seeds | | 30/70 | View variety |
| Mandala Purple #1 x Aloha WW | The Blazing Pistileros | | 30/70 | View variety |
| Mandalime Juice | Bulk Seed Bank | | 60/40 | View variety |
| Mandalorian | Makena Genetics | | 50/50 | View variety |
| Mandarin CBD #3 (Mandarin Mimosa lineage, Emerald Triangle) | Unknown | | Unavailable | View variety |
| Mandarin Cookie Sherbert | Holy Smoke Seeds | | 60/40 | View variety |