| Marble Berry OG | Enlightened Genetics | | 60/40 | View variety |
| Marcia’s Gift | Unknown | | 50/50 | View variety |
| Margalope | Cannarado Genetics | | 20/80 | View variety |
| Margarita | Massive Creations | Unknown Strain · [unknown Black Lime] × 4 Kings | 60/40 | View variety |
| Margarita Madness | The Bakery Genetics | | 50/50 | View variety |
| Margo | South Fork Seed Collective | | 60/40 | View variety |
| Margoot | Green Devil Genetics | | 30/70 | View variety |
| Margwa #1 (Cobra Chi lineage, Beleaf Cannabis) | Unknown | | Unavailable | View variety |
| Marilyn Monroe | Lit Farms | | 60/40 | View variety |
| Marilyn Monroe | The Bakery Genetics | | 50/50 | View variety |
| Marion Berry | Stoney Girl Gardens | | 40/60 | View variety |
| Marionberry Kush | SubCool’s The Dank | | 80/20 | View variety |
| Marley's Auto | Shaman Genetics | | 60/40 | View variety |
| Marley's Bud | Bulk Seed Bank | | 50/50 | View variety |
| Marley's Cheese | Kaliman Seeds | | 20/80 | View variety |
| Marley's Tribute | Shaman Genetics | | 60/40 | View variety |
| Marleys Collie | Sensi Seeds | | 50/50 | View variety |
| Marley’s Grin | Mephisto Genetics | | 50/50 | View variety |
| MarlysCollie x G13 | Twisty Seeds | | 80/20 | View variety |
| Marmalade | Lady Sativa Genetics | | 40/60 | View variety |