| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Season | Source | Registered |
|
1
| 'Oberland Advanced Technology' | Large | Light-Green | Marginal | White | Unknown | July into August | Rank, Stefan | .2013 |
|
2
| 'Oberland Colourful Noise' | Large | Dark-Green | Streaked | White | Sport | July into August | Rank, Stefan | .2013 |
|
3
| 'Oberland Spring Air' | Medium | Med-Green | Medial | White | Sport | July into August | Rank, Stefan | .2013 |
|
4
| 'Oberland Thin Line' | Medium | Blue/Green | Marginal | Yellow | Sport | July into August | Rank, Stefan | --NR-- |
|
5
| 'Obi-Wan Kenobi' | Medium | Med-Green | Medial | Yellow | Nat-Sport | August | Vandekinderen, Gino | --NR-- |
|
6
| 'Obsession' | Medium | Med-Green | Marginal | Greenish White | Sport | August | Avent, Tony | .1998 |
|
7
| 'Occupy Wall Street' | Small | Blue/Green | Marginal | White | Unknown | July into August | Freeman, Franc | .2012 |
|
8
| 'Ocean Isle Gold Dust' | Medium | Light-Green | Medial | Yellow | Sport | July into August | Chopko, Dave | --NR-- |
|
9
| 'Ocean Isle Tornado' | Medium | Med-Green | Medial | White | Sport | July into August | Chopko, Dave | --NR-- |
|
10
| 'Ocean Isle Twist' | Medium | Dark-Green | Medial | White | Sport | July into August | Chopko, Dave | --NR-- |
|
11
| 'Oceans Blue' | Large | Blue/Green | - | - | Unknown | July into August | Schmidt, Bevie | .2009 |
|
12
| 'October Sky' | Medium | Blue/Green | - | - | Hybrid | August to September | Dean, Don | .2008 |
|
13
| 'Oder' | Medium | Blue/Green | - | - | Unknown | July into August | Klose, Heinz | --NR-- |
|
14
| 'Oga' | Medium | Med-Green | - | - | Hybrid | August | Unknown | --NR-- |
|
15
| 'Ogon Iwa' | Medium | Yellow | - | - | Unknown | August to September | Unknown | --NR-- |
|
16
| 'Ogon Koba' | Small | Yellow | - | - | Unknown | August | Unknown | --NR-- |
|
17
| 'Ogon Kuro' | Giant | Yellow | - | - | Sport | July into August | Unknown | --NR-- |
|
18
| 'Ogon Sagae' | Medium | Yellow | - | - | Unknown | July into August | Unknown | --NR-- |
|
19
| 'Ogon Tachi' | Large | Light-Green | - | - | Unknown | August | Unknown & Ruh, Peter | .2002 .2018 |
|
20
| 'Ogon Tsushima' | Medium | Yellow | - | - | Unknown | July into August | Unknown & Ruh, Peter | .2002 .2018 |
|
21
| 'Ohh! Amber' | Small | Dark-Green | Marginal | White | Hybrid | July into August | Schultz, Ed | .2021 |
|
22
| 'Ohh! Clare' | Large | Yellow | - | - | Unknown | July into August | Schulz, Ed | .2016 |
|
23
| 'Ohh! Elvira' | Large | Yellow | - | - | Unknown | July into August | Schulz, Ed | .2016 |
|
24
| 'Ohh! Richland Reward' | Medium | Yellow | Marginal | White | TC Sport | July into August | Schulz, Ed | --NR-- |
|
25
| 'OHS Calamari' | Small | Med-Green | Medial | White | TC Sport | August to September | Lasek, Robert & Ontario Hosta Society | .2008 |
|
26
| 'OHS Juno' | Medium | Blue/Green | - | - | Sport | July into August | Ontario Hosta Society | --NR-- |
|
27
| 'OHS Margot's Delight' | Medium | Blue/Green | - | - | Sport | July into August | Ontario Hosta Society | --NR-- |
|
28
| 'Oil Paint' | Medium | Dark-Green | Streaked | Yellow | Hybrid | July into August | Van Eechaute, Danny | .2013 |
|
29
| 'Okaydokey' | Medium | Yellow | Marginal | Dark Green | Sport | July into August | Walters Gardens & Walek, Kevin & The American Hosta Society | .2009 |
|
30
| 'Okazaki' | Small | Med-Green | - | - | Hybrid | August to September | Sugita, Hajime & Ruh, Peter & Ruh, Jean | .2002 |
|
31
| 'Okefenokee' | Medium | Med-Green | Marginal | Yellow | Sport | July into August | Benedict, Dr Ralph (Herb) & Walek, Kevin & The American Hosta Society | .2009 |
|
32
| 'Okutama Nishiki' | Small | Med-Green | Medial | Yellow | Unknown | August to October | Unknown | --NR-- |
|
33
| 'Old Faithful' | Large | Med-Green | - | - | Hybrid | August to October | Brincka, Wm & Petryszyn, 0lga | .1991 |
|
34
| 'Olga Gibosa' | Large | Med-Green | - | - | Unknown | July into August | Wade, Van | --NR-- |
|
35
| 'Olympic Fab Five' | Medium | Yellow | - | - | Unknown | July into August | Freeman, Franc | .2012 |
|
36
| 'Olympic Glacier' | Medium | Dark-Green | Marginal | Yellow | Sport | July into August | Naylor Creek Nursery | .2005 |
|
37
| 'Olympic Gold' | Medium | Yellow | - | - | Unknown | July into August | Banyai, Pauline | .1986 |
|
38
| 'Olympic Gold Medal' | Medium | Yellow | - | - | Sport | July into August | Fransen, Marco & Naylor Creek Nursery | --NR-- |
|
39
| 'Olympic Silver Medal' | Medium | Blue/Green | - | - | Sport | July into August | Fransen, Marco & Naylor Creek Nursery | --NR-- |
|
40
| 'Olympic Sunrise' | Medium | Blue/Green | Medial | Yellow | Sport | July into August | Naylor Creek Nursery | .2005 |
|
41
| 'Olympic Torch' | Large | Yellow | - | - | Hybrid | July into August | Goodwin, Randy | .2009 |
|
42
| 'Olympic Twilight' | Medium | Blue/Green | Marginal | Yellow | Sport | July into August | Naylor Creek Nursery | --NR-- |
|
43
| 'On Fire' | Medium | Blue/Green | Streaked | Yellow | TC Sport | July into August | Zilis, Mark | .2011 |
|
44
| 'On the Border' | Medium | Med-Green | Marginal | White | Hybrid | August | Beilstein, Doug | .2007 |
|
45
| 'On the Marc' | Medium | Med-Green | Medial | Yellow | Sport | August | Laviana, Marc & Malloy, Alex | .1999 |
|
46
| 'Once upon a Time' | Medium | Med-Green | Marginal | White | Hybrid | August | Wilkins, Dr Jim & Wilkins, Sandy | .2002 |
|
47
| 'One Man's Treasure' | Medium | Dark-Green | - | - | Sport | August to October | Benedict, Dr Ralph (Herb) & Solberg, Robert | .1999 |
|
48
| 'One-trip Salad Bar' | Small | Dark-Green | Marginal | Yellow | Nat-Sport | July into August | Solberg, Robert | --NR-- |
|
49
| 'OOME' | Large | Blue/Green | Streaked | Speckles | Hybrid | July into August | Gussman, Christopher | .2009 |
|
50
| 'Opipara' | Medium | Med-Green | Marginal | Yellow | Unknown | July into August | Maekawa, Dr Fumio & The American Hosta Society | .2002 |
|
51
| 'Opipara Koriyama' | Medium | Med-Green | Marginal | White | Unknown | August | Unknown | --NR-- |
|
52
| 'Orange Marmalade' | Large | Med-Green | Medial | White | Sport | July into August | Solberg, Robert | .2002 |
|
53
| 'Orange Slices' | Medium | Yellow | - | - | TC Sport | July into August | Zilis, Mark | .2003 |
|
54
| 'Orange Star' | Medium | Yellow | - | - | Sport | July into August | Van den Top, Jan | --NR-- |
|
55
| 'Oreo Cream' | Medium | Dark-Green | Medial | White | Sport | July into August | Ziarek, Ken | --NR-- |
|
56
| 'Oriana' | Medium | Yellow | - | - | Sport | July into August | Smith, Eric | --NR-- |
|
57
| 'Orinoco Flow' | Medium | Med-Green | - | - | Hybrid | July into August | Cross, Peter | .2002 |
|
58
| 'Orphan Train Rider' | Small | Light-Green | - | - | Unknown | July into August | Kwick, Charles | .2017 |
|
59
| 'Orphan Train Ruffian' | Medium | Dark-Green | - | - | Hybrid | July into August | Kwick, Charles | .2017 |
|
60
| 'Oshima Silk' | Medium | Med-Green | Marginal | White | Hybrid | August to September | Shimizu, Toshirou & Zilis, Mark | .2009 |
|
61
| 'Osiris Folichon' | Medium | Med-Green | - | - | Unknown | August | Fafard, Serge | --NR-- |
|
62
| 'Otao Keikoku' | Small | Med-Green | - | - | Unknown | August | Savory, Robert | --NR-- |
|
63
| 'Otome-no-Ka' | Medium | Dark-Green | - | - | Unknown | August | Watanabe, Kenji & Ruh, Peter | .2002 |
|
64
| 'Ototo San' | Miniature | Dark-Green | Marginal | White | Unknown | August to September | Ruh, Peter | .1990 .2018 |
|
65
| 'Outer Limits' | Medium | Med-Green | Medial | Speckles | Sport | July into August | Bennerup, Pierre | .2000 |
|
66
| 'Outrageous Dragon' | - | Dark-Green | Streaked | White | Hybrid | July into August | Kuenster, Rod | .2010 |
|
67
| 'Over the Waves' | Medium | Blue/Green | - | - | Unknown | August to September | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
|
68
| 'Over Yu Wu' | Giant | Light-Green | | | Hybrid | July into August | Daughenbaugh, Walt | .2021 |
|
69
| 'Oxford Blue Top' | Miniature | Blue/Green | | - | Unknown | August to September | Colley, June & Baker, John | .2020 |
|
70
| 'Oyster Bay' | Medium | Blue/Green | Marginal | Yellow | Nat-Sport | August | Solberg, Robert | --NR-- |
|
71
| 'Oze' | Miniature | Med-Green | Marginal | Yellow | Unknown | August | Unknown | --NR-- |
|
72
| 'Oze Shirobana Mizu' | Medium | Med-Green | - | - | Sport | August to October | Unknown | --NR-- |
|