| Marshmallow Mountain | Exotic Genetix | | 50/50 | View variety |
| Marshmallow OG | Compound Genetics | | 60/40 | View variety |
| Marshmallow OG | Wyeast Farms | | 60/40 | View variety |
| Marshmallow Pancakes | Holy Smoke Seeds | | 60/40 | View variety |
| Marshmelon | Riot Seeds | | 70/30 | View variety |
| Marsquake | Lovin' in Her Eyes | | 60/40 | View variety |
| Martha My Dear | Delicatessen | | 50/50 | View variety |
| Martian Candy | Unknown | | 70/30 | View variety |
| Martian Candy OG on Fire | The Vault Seed Bank | | 60/40 | View variety |
| Martian Fritterz | The Bakery Genetics | | 50/50 | View variety |
| Martian Koolaid | MTG Seeds | | 60/40 | View variety |
| Martian Kush | DNA Genetics Seeds | | 70/30 | View variety |
| Martian Mean Green | DNA Genetics Seeds | | 60/40 | View variety |
| Martian Milkshake V2 | The Bakery Genetics | | 50/50 | View variety |
| Martian Punchbowl | The Bakery Genetics | | 50/50 | View variety |
| Maruf Black | Tonygreens Tortured Beans | | 100/0 | View variety |
| Maruf Black Selection | Indian Landrace Exchange | | 100/0 | View variety |
| Maruf Kandahar | Indian Landrace Exchange | | 100/0 | View variety |
| Maruf Red Selection | Indian Landrace Exchange | | 100/0 | View variety |
| Marvista | Moscaseeds | | 70/30 | View variety |