| MT Grown Kush | Cannarado Genetics | | 80/20 | View variety |
| Mt. Hood Magic | Unknown | | 20/80 | View variety |
| Mt. Rainier | RedEyed Genetics | | 50/50 | View variety |
| Mt. Tropicana | Massive Seeds | | 50/50 | View variety |
| Mt. Valley Kush. (Bear Creek Kush lineage, Doc's Dank Seeds) | Unknown | | Unavailable | View variety |
| MTF 74 Guava Hard Candy | Lupos CannaSeed | | 50/50 | View variety |
| Muay Thai | Flash Seeds | | 20/80 | View variety |
| Muchacha | Twenty 20 Genetics | | 50/50 | View variety |
| Mud Bight Delight | Unknown | Selected from: Afgani · [Ketchikan, Alaska] | 80/20 | View variety |
| Mud Bight Delight | Alaska Cannabis Cache | | 20/80 | View variety |
| Mud Pie | Thunderfudge | | 60/40 | View variety |
| Mudbone | Boneyard Seeds Norcal | | 80/20 | View variety |
| Muddy Buddy | Lost River Seeds | | 50/50 | View variety |
| Muddy Waters | Moscaseeds | | 70/30 | View variety |
| Mudhoney | Seattle Chronic Seeds | | 50/50 | View variety |
| Mudslide | Sin City Seeds | | 60/40 | View variety |
| Muerte OG Kush | Riot Seeds | | 80/20 | View variety |
| Muff Diver | South Bay Genetics | | 60/40 | View variety |
| Muffin Limburger | Massive Creations | | 50/50 | View variety |
| Muffin Zops | James Loud Genetics | | 70/30 | View variety |