| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Ma Breeder' | Large | Yellow | Streaked | Speckles | Hybrid | Near-White | June into July | Kuenster, Rod | .2008 |
| 'Mary Schwartzbauer' | Large | Med-Green | Streaked | Yellow | Hybrid | Near-White | June into July | Gowen, Hideko & Larsen, Kim | .2008 |
| 'Marýke Lokike' | Medium | Blue/Green | - | - | Hybrid | - | June into July | Lokies, Martin | .2008 |
| 'Mean Joe Green' | Medium | Blue/Green | - | - | Hybrid | Med-Lavender | July into August | Zolock, Steve & Sarah | .2008 |
| 'Merci Marci' | Small | Blue/Green | Marginal | White | Unknown | - | July into August | Asch, Stuart | .2008 |
| 'Misty May' | Medium | Med-Green | Streaked | Speckles | Hybrid | Med-Lavender | July into August | Kuenster, Rod | .2008 |
| 'Mosel' | Medium | Med-Green | - | - | Unknown | Med-Lavender | - | Klose, Heinz & Ruh, Peter & Jean | .2008 |
| 'Mustang Sally' | Medium | Dark-Green | - | - | Hybrid | - | - | Wasitis, Chick | .2008 |
| 'My Mom' | Medium | Dark-Green | Streaked | Yellow | Hybrid | Near-White | June | Kuenster, Rod | .2008 |
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