| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'I'm So Blue' | Large | Blue/Green | - | - | Unknown | Near-White | June | Schwarz, Jim | .1999 |
|
2
| 'M Go Blue' | Large | Blue/Green | - | - | Hybrid | - | July into August | Schmidt, Bevie | .2009 |
|
3
| 'Macabe Blue' | Medium | Blue/Green | - | - | Unknown | Near-White | July | Summers, Alex | --NR-- |
|
4
| 'Mad About Blue' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | July | Zilis, Mark | .2009 |
|
5
| 'Magical Mouse Ears' | Miniature | Blue/Green | - | - | Sport | Light-Purple | July | Fransen, Marco | --NR-- |
|
6
| 'Maize and Blue' | Medium | Blue/Green | Streaked | Yellow | Unknown | - | - | Wilkins, Dr Jim | .2000 |
|
7
| 'Majestic Blue' | Large | Blue/Green | - | - | Unknown | - | - | Aden, Paul | --NR-- |
|
8
| 'Mama Blue' | - | Blue/Green | Medial | White | Unknown | - | - | Goodwin, Randy | --NR-- |
|
9
| 'Maui Blue Kitten' | Medium | Blue/Green | - | - | Hybrid | - | - | Vaughn, William | --NR-- |
|
10
| 'Maui Blue Surf' | Medium | Blue/Green | Streaked | Yellow | Hybrid | - | June into July | Elslager, Ed | .2004 |
|
11
| 'Memphis Blue' | Giant | Blue/Green | - | - | Hybrid | - | - | Petryszyn, Olga | .2021 |
|
12
| 'Michigan Blue' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
|
13
| 'Midas Mouse' | Miniature | Yellow | - | - | Sport | Pale-Lavender | June into July | Ward, Dr Dick & Ward, Jane | .2014 |
|
14
| 'Midnight Blue' | | Blue/Green | | | Unknown | | | Unknown (Listed) | --NR-- |
|
15
| 'Midwest Blue' | Large | Blue/Green | - | - | Sport | Near-White | June into July | Summers, Alex | --NR-- |
|
16
| 'Mighty Mouse' | Small | Blue/Green | Marginal | Yellow | Sport | Light-Purple | July | Walters Gardens | .2006 |
|
17
| 'Mimosa Mouse Ears' | Small | Blue/Green | - | - | Sport | Light-Purple | July | Silvers, Bill | --NR-- |
|
18
| 'Minerva Mouse Ears' | Small | Med-Green | Marginal | Yellow | Sport | Light-Purple | July | Silvers, Bill | --NR-- |
|
19
| 'Minna Blue' | Medium | Blue/Green | - | - | Unknown | - | August | Ruh, Jean | .1997 |
|
20
| 'Mister Blue' | - | - | - | - | Unknown | - | - | Unknown | --NR-- |
|
21
| 'Mollie's Blaue' | Large | Blue/Green | - | - | Unknown | - | - | Ahlburg, Marlene | --NR-- |
|
22
| 'Monashee Blue Cup' | Small | Blue/Green | - | - | Unknown | - | - | Montgomery, John | --NR-- |
|
23
| 'Montana Blue' | Large | Blue/Green | - | - | Unknown | - | - | Unknown | --NR-- |
|
24
| 'Montreal Blue Ice Storm' | Giant | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Wade, Van | .2007 |
|
25
| 'Moody Blues' | Medium | Blue/Green | - | - | Unknown | Pale-Lavender | - | Oudolf, Piet & Heemskerk, Gerardus | --NR-- |
|
26
| 'Moon Is Blue' | Medium | Blue/Green | - | - | Unknown | - | - | Moldovan, Steve | --NR-- |
|
27
| 'Moonshine Mouse Ears' | Small | Med-Green | Marginal | Yellow | Sport | Light-Purple | July | Silvers, Bill | --NR-- |
|
28
| 'Moscow Blue' | Large | Blue/Green | - | - | Hybrid | Near-White | July into August | Arett, Anne & The American Hosta Society | .1986 |
|
29
| 'Mouse Aquarel' | Miniature | Blue/Green | Marginal | White | Nat-Sport | Light-Purple | July | Van Eechaute, Danny | --NR-- |
|
30
| 'Mouse Capades' | Small | Blue/Green | Marginal | White | Sport | Light-Purple | June into July | Mortko, Rob | .2013 |
|
31
| 'Mouse King' | Miniature | Dark-Green | Marginal | Green | Sport | Med-Lavender | June | Ward, Dr Dick & Ward, Jane | .2014 |
|
32
| 'Mouse Madness' | Miniature | Blue/Green | Marginal | White | Sport | - | July into August | Solberg, Robert | .2020 |
|
33
| 'Mouse on the Moon' | Miniature | Blue/Green | Marginal | White | TC Sport | Med-Lavender | - | Zilis, Mark & Solberg, Robert | --NR-- |
|
34
| 'Mouse Party' | Small | Dark-Green | Streaked | Yellow | Sport | Light-Purple | July | Van Eechaute, Danny | --NR-- |
|
35
| 'Mouse Tracks' | Miniature | Blue/Green | Streaked | White | Sport | Light-Purple | June into July | Walters Gardens | .2009 |
|
36
| 'Mouse Trap' | Small | Blue/Green | Medial | White | Sport | Pale-Lavender | - | Hansen, Hans & Shady Oaks Nursery | --NR-- |
|
37
| 'Mouseketeer' | Small | Blue/Green | Medial | Yellow | Hybrid | | | Hansen, Hans 1950 1960 | .2021 |
|
38
| 'Mr Blue' | Medium | Blue/Green | - | - | Hybrid | - | July into August | Wrede, Arthur | .2005 |
|
39
| 'Mrs Mouse Ears' | - | Blue/Green | - | - | Sport | Light-Purple | July | Unknown | --NR-- |
|
40
| 'My Blue Heaven' | Medium | Blue/Green | - | - | Unknown | Light-Purple | July | Banyai, Pauline & Elslager, Ed | .1997 |
|
41
| 'Mystic Mouse' | Miniature | Blue/Green | Marginal | Blue-Green | Sport | Light-Purple | July | Van Eechaute, Danny | .2010 |
|