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No.Cultivar NamePlant SizeLeaf ColorVariegationVar ColorOriginFlower ColorSeasonSourceRegistered
1 'O Kanzashi'MediumMed-Green--SportLight-Purple-Unknown--NR--
2 'Oberland Thin Line'MediumBlue/GreenMarginalYellowSportPale-LavenderJuly into AugustRank, Stefan--NR--
3 'October Sky'MediumBlue/Green--HybridNear-WhiteAugust to SeptemberDean, Don.2008
4 'Odd Goddess'MediumMed-Green--HybridPale-LavenderJune into JulyKwick, Charles.2017
5 'Ogon Hime Tokudama'SmallLight-Green--UnknownPale-LavenderJune into JulyUnknown & Ruh, Peter.2002 .2018
6 'Ogon Iwa'MediumYellow--UnknownMed-LavenderAugust to SeptemberUnknown--NR--
7 'Ogon Sudare'SmallYellow--UnknownPale-LavenderJulyLantis, Clarence & Ruh, Peter.2002 .2018
8 'Ogon Tachi'LargeLight-Green--UnknownDeep-PurpleAugustLantis, Clarence & Ruh, Peter.2002 .2018
9 'Ogon Tsushima'MediumYellow--UnknownLight-PurpleJuly into AugustUnknown & Ruh, Peter.2002 .2018
10 'Ohh! Blue Beacon'SmallBlue/Green--UnknownNear-WhiteJune into JulySchulz, Ed.2013
11 'Ohh! Blue Bounty'LargeBlue/Green--UnknownNear-WhiteJune into JulySchulz, Ed.2011
12 'Ohh! Blue Bruiser'GiantBlue/Green--UnknownMed-Lavender-Schulz, Ed.2011
13 'Ohh! Blue Granite'MediumBlue/Green--UnknownNear-WhiteJune into JulySchulz, Ed.2018
14 'Ohh! His Blue Eyes'LargeBlue/Green--UnknownMed-LavenderJune into JulySchulz, Ed.2017
15 'Ohh! Jewell'LargeYellow--UnknownNear-WhiteJune into JulySchulz, Ed.2017
16 'Ohh! Viola'MediumYellow--UnknownNear-WhiteJune into JulySchulz, Ed.2015
17 'OHS Margot's Delight'MediumBlue/Green--SportPale-LavenderJuly into AugustOntario Hosta Society--NR--
18 'Ojibway'MediumBlue/Green--Unknown--Wade, Van--NR--
19 'Old Bill'GiantBlue/Green--HybridPale-LavenderJune into JulyGilligan, Madelon.2012
20 'Old Ironsides'GiantLight-Green--SportMed-LavenderJulySummers, Alex--NR--
21 'Old Smoky'LargeMed-Green--HybridNear-WhiteJune into JulyMcDonell, Harold.2014
22 'One Fine Day'MediumMed-GreenMarginalYellowHybridNear-WhiteJune into JulyWard, Dr Dick & Ward, Jane.2012
23 'Orphan Train Rider'SmallLight-Green--UnknownMed-LavenderJuly into AugustKwick, Charles.2017
24 'Orphan Train Ruffian'MediumDark-Green--HybridPale-LavenderJuly into AugustKwick, Charles.2017
25 'Osiris Ovation'LargeYellow--UnknownPale-Lavender-Fafard, Serge--NR--
26 'Otara's Angel'LargeDark-GreenMarginalYellowSportNear-WhiteJune into JulyJohns, Eddie--NR--
27 'Ottawa'LargeMed-Green--Unknown--Wade, Van--NR--
28 'Ovalwood'LargeBlue/Green--HybridNear-WhiteJulyBeilstein, Doug & Beilstein, Mardy.2012
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