| No. | Hosta Cultivar | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Mean Joe Green' | Medium | Blue/Green | - | - | Hybrid | Med-Lavender | July into August | Zolock, Steve & Zolock, Sarah | .2008 |
|
2
| 'Metallica' | Medium | Blue/Green | - | - | Hybrid | Med-Lavender | August | Lachman, Wm & Lachman, Eleanor | .1991 |
|
3
| 'Microtardiana' | Medium | Blue/Green | - | - | Unknown | Med-Lavender | August | Bowden, Roger | --NR-- |
|
4
| 'Missouri River' | Small | Blue/Green | - | - | Hybrid | Near-White | July | Beilstein, Doug & Malloy, Alex | .2005 |
|
5
| 'Moody Blues' | Medium | Blue/Green | - | - | Unknown | Pale-Lavender | - | Oudolf, Piet & Heemskerk, Gerardus | --NR-- |
|
6
| 'Mosel' | Medium | Med-Green | - | - | Unknown | Med-Lavender | - | Klose, Heinz & Ruh, Peter & Ruh, Jean | .2008 |
|
7
| 'Mr Blue' | Medium | Blue/Green | - | - | Hybrid | - | July into August | Wrede, Arthur | .2005 |
|