| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'L'lle d'Orleans' | Medium | Light-Green | | - | Unknown | Near-White | - | Bastille, Jocelyne | --NR-- |
|
2
| 'Occupy Wall Street' | Small | Blue/Green | Marginal | White | Unknown | Unknown | July into August | Freeman, Franc | .2012 |
|
3
| 'Ocean Isle Tornado' | Medium | Med-Green | Medial | White | Sport | Med-Lavender | July into August | Chopko, Dave | --NR-- |
|
4
| 'Ogon Sudare' | Small | Yellow | | - | Unknown | Pale-Lavender | July | Unknown & Ruh, Peter | .2002 .2018 |
|
5
| 'Ogon Tachi' | Large | Light-Green | | - | Unknown | Deep-Purple | August | Unknown & Ruh, Peter | .2002 .2018 |
|
6
| 'Ogon Tsushima' | Medium | Yellow | | - | Unknown | Light-Purple | July into August | Unknown & Ruh, Peter | .2002 .2018 |
|
7
| 'Oh Charlie' | Large | Med-Green | Marginal | Yellow | TC Sport | Pale-Lavender | July | Ziarek, Ken | --NR-- |
|
8
| 'Oh Dannyboy' | Large | Dark-Green | | - | Unknown | Unknown | - | Skaggs, Virginia & Skaggs, Brian | --NR-- |
|
9
| 'Oh! Susanna' | Medium | Blue/Green | | - | Hybrid | Med-Lavender | June into July | Reuter, Laurence & Gilligan, Madelon | .2015 |
|
10
| 'O'Harra' | Small | Yellow | | - | Unknown | Deep-Purple | July | O'Harra, Russ & Walek, Kevin & The American Hosta Society | .2009 |
|
11
| 'Ohh! Amber' | Small | Dark-Green | Marginal | White | Hybrid | Med-Lavender | July into August | Schultz, Ed | .2021 |
|
12
| 'Ohh! Blue Bounty' | Large | Blue/Green | | - | Unknown | Near-White | June into July | Schulz, Ed | .2011 |
|
13
| 'Ohh! Charlotte!' | Large | Yellow | | - | Unknown | Unknown | June into July | Schulz, Ed | .2012 |
|
14
| 'Ohh! Jewel' | Large | Yellow | | - | Unknown | Near-White | June into July | Schulz, Ed | .2017 |
|
15
| 'Ohh! Laurel' | - | Yellow | | - | Unknown | Unknown | - | Schulz, Ed | .2009 |
|
16
| 'Ohh! Valeria' | Large | Yellow | | - | Unknown | Unknown | - | Schulz, Ed | .2009 |
|
17
| 'Ohh! Viola' | Medium | Yellow | | - | Unknown | Near-White | June into July | Schulz, Ed | .2015 |
|
18
| 'OHS Juno' | Medium | Blue/Green | | - | Sport | Pale-Lavender | July into August | Ontario Hosta Society | --NR-- |
|
19
| 'Okeanos' | Medium | Dark-Green | Streaked | White | Unknown | Unknown | - | Leuckx, Bart | --NR-- |
|
20
| 'Old Bill' | Giant | Blue/Green | | - | Hybrid | Pale-Lavender | June into July | Gilligan, Madelon | .2012 |
|
21
| 'Old Cardboard Boxes' | Large | Blue/Green | | - | Unknown | Unknown | - | Marcelle, Eric | --NR-- |
|
22
| 'Old Ironsides' | Giant | Light-Green | | - | Sport | Med-Lavender | July | Summers, Alex | --NR-- |
|
23
| 'Old Smoky' | Large | Med-Green | | - | Hybrid | Near-White | June into July | McDonell, Harold | .2014 |
|
24
| 'Old Wethersfield' | Large | Dark-Green | | | Unknown | Light-Purple | - | Goodenough, Rick | --NR-- |
|
25
| 'Olive Oyl' | Large | Med-Green | Marginal | Yellow | Unknown | Unknown | - | Carlson, Monty & Carlson, Julie | --NR-- |
|
26
| 'Olympic Magic' | Medium | Light-Green | Streaked | Speckles | Sport | Pale-Lavender | July | Naylor Creek Nursery | --NR-- |
|
27
| 'Oma's Sunrise' | Large | Blue/Green | | - | Unknown | Unknown | - | Sisson, Kathie | --NR-- |
|
28
| 'Omatsu-san Nishiki' | Small | Light-Green | | - | Unknown | Light-Purple | - | Ruh, Peter | .2002 .2018 |
|
29
| 'Omega' | Large | Med-Green | Marginal | Yellow | Unknown | Unknown | - | Unknown | --NR-- |
|
30
| 'On Fire' | Medium | Blue/Green | Streaked | Yellow | TC Sport | Light-Purple | July into August | Zilis, Mark | .2011 |
|
31
| 'On Golden Pond' | Giant | Dark-Green | Marginal | Yellow | Hybrid | Near-White | July | Elslager, Ed | .2005 |
|
32
| 'Only You' | Medium | Med-Green | Marginal | White | Hybrid | Unknown | Unknown | Ward, Dr Dick & Ward, Jane | .2012 |
|
33
| 'Ooshima-jishi' | Medium | Med-Green | Medial | Yellow | Unknown | Unknown | - | Unknown | --NR-- |
|
34
| 'Orange Rose' | Small | Dark-Green | Medial | Yellow | Sport | Unknown | June into July | McHugh, Ed | .2012 |
|
35
| 'Orinoco Flow' | Medium | Med-Green | | - | Hybrid | Pale-Lavender | July into August | Cross, Peter | .2002 |
|
36
| 'Orphan Train Twins' | Medium | Dark-Green | | | Hybrid | Pale-Lavender | July | Kwick, Charles | .2021 |
|
37
| 'Osiris Pacha' | Medium | Med-Green | Marginal | Yellow | Unknown | Unknown | - | Fafard, Serge | --NR-- |
|
38
| 'Osiris Trouvaille' | Large | Blue/Green | Marginal | Yellow | Unknown | Unknown | - | Fafard, Serge | --NR-- |
|
39
| 'Otome-no-Ka' | Medium | Dark-Green | | - | Unknown | Light-Purple | August | Watanabe, Kenji & Ruh, Peter | .2002 |
|
40
| 'Outrageous' | Large | Dark-Green | Streaked | White | Hybrid | Pale-Lavender | July | Benedict, Dr Ralph (Herb) & Walek, Kevin & The American Hosta Society | .2009 |
|
41
| 'Over the Rainbow' | Large | Med-Green | Streaked | Speckles | Hybrid | Near-White | June into July | Elslager, Ed | .2005 |
|
42
| 'Over the Waves' | Medium | Blue/Green | | - | Unknown | Unknown | August to September | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
|
43
| 'Over Yu Wu' | Giant | Light-Green | | | Hybrid | Near-White | July into August | Daughenbaugh, Walt | .2021 |
|
44
| 'Oze' | Miniature | Med-Green | Marginal | Yellow | Unknown | Near-White | August | Unknown | --NR-- |
|