| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Madelynn' | Large | Blue/Green | - | - | Unknown | Pure-White | June | Darr, D. & Wade, Van | .2007 |
| 'Mama Streaker' | Medium | Med-Green | Streaked | White | Unknown | Light-Purple | August | Wade, Van | --NR-- |
| 'Mandan' (Wade) | Large | Blue/Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Maui Buttercups with Green Edge' | Small | Yellow | Marginal | Green | Sport | - | - | Wade, Van | --NR-- |
| 'Medicine Man' | Medium | Yellow | Marginal | Blue-Green | Unknown | - | - | Wade, Van | --NR-- |
| 'Menominee' | Large | Blue/Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Merle' | Large | Blue/Green | - | - | Hybrid | - | - | Wade, Van | .2007 |
| 'Miami' | Large | Blue/Green | - | - | Hybrid | Near-White | June into July | Wade, Van | --NR-- |
| 'Michael' | Medium | Med-Green | Marginal | White | Sport | Light-Purple | July | Wade, Van | --NR-- |
| 'Mighty Moe Supreme' | Miniature | Med-Green | Medial | White | Sport | Pale-Lavender | June into July | Wade, Van | .2015 |
| 'Milky Way' (Wade) | Large | Dark-Green | Streaked | White | Unknown | - | - | Wade, Van | --NR-- |
| 'Mingo' | Large | Dark-Green | - | - | Unknown | Pale-Lavender | July | Wade, Van | .2007 |
| 'Misty One' | - | - | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Mohawk' | Large | Med-Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Montreal Blue Ice Storm' | Giant | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Wade, Van | .2007 |
| 'Mountain Man' | Large | Med-Green | - | - | Unknown | Near-White | June | Wade, Van | --NR-- |
| 'Munchkin Madness' | Medium | Med-Green | Marginal | White | Unknown | Light-Purple | July | Wade, Van | --NR-- |
| 'Muppett' | Medium | Med-Green | - | - | Unknown | Pale-Lavender | July | Wade, Van | .2007 |
| 'My Heart' | Medium | Blue/Green | - | - | Unknown | Light-Purple | July | Wade, Van | .2007 |
| 'My Valentine' | Miniature | Dark-Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
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