Cultivar NamePlant SizeLeaf ColorVariegationVar ColorOriginFlower ColorSeasonSourceRegistered
'Odina'LargeBlue/Green--Unknown--Wade, Van--NR--
'Ogon Otome Hideko'MiniatureYellow--Unknown--Unknown--NR--
'Oh Audrey'MediumLight-GreenMarginalWhiteSportPure-WhiteJune into JulySilvers, Bill.2013
'Oh Charlie'LargeMed-GreenMarginalYellowTC SportPale-LavenderJulyZiarek, Ken--NR--
'Oh Cindy'MediumLight-Green--SportPale-LavenderJulyBenedict, Dr Ralph (Herb)--NR--
'Oh Dannyboy'LargeDark-Green--Unknown--Skaggs, Virginia & Skaggs, Brian--NR--
'Oh Henry'MediumBlue/GreenStreakedYellowUnknown--Unknown--NR--
'Oh! Susanna'MediumBlue/Green--HybridMed-LavenderJune into JulyReuter, Laurence & Gilligan, Madelon.2015
'Ohh! Blue Otto'SmallBlue/Green--Unknown--Schulz, Ed.2009
'Ohh! Charlotte!'LargeYellow--Unknown-June into JulySchulz, Ed.2012
'Ohh! Clare'LargeYellow--Unknown-July into AugustSchulz, Ed.2016
'Ohh! Elvira'LargeYellow--Unknown-July into AugustSchulz, Ed.2016
'Ohh! Jewell'LargeYellow--UnknownNear-WhiteJune into JulySchulz, Ed.2017
'Ohh! Laurel'-Yellow--Unknown--Schulz, Ed.2009
'Ohh! Viola'MediumYellow--UnknownNear-WhiteJune into JulySchulz, Ed.2015
'OHS Bryan's Blue'MediumBlue/Green--Hybrid--Ontario Hosta Society--NR--
'OHS Butter Pat'Medium---Hybrid--Ontario Hosta Society--NR--
'OHS Margot's Delight'MediumBlue/Green--SportPale-LavenderJuly into AugustOntario Hosta Society--NR--
'Olga'----Unknown--Unknown--NR--
'Olga's Shiny Leaf'SmallDark-Green--SportMed-Lavender-Thiemann, Olga & Ruh, Peter & Ruh, Jean.2004
'Oliver'SmallMed-GreenMarginalWhiteUnknown--O'Harra, Russ--NR--
'Oliver Garden'MediumMed-GreenStreakedWhiteUnknown--Unknown--NR--
'Olive's Freckles'GiantMed-Green--UnknownPale-LavenderJulyPauley, Olive--NR--
'Olivia'MediumBlue/Green--UnknownNear-White-Schwarz, Jim--NR--
'Omar the Tentmaker'LargeMed-Green--Unknown--Unknown--NR--
'Oriana'MediumYellow--SportPale-LavenderJuly into AugustSmith, Eric--NR--
'Orphan Annie'MiniatureMed-GreenMarginalWhiteUnknownLight-PurpleJulyUnknown--NR--
'Our Friend Reldon'LargeBlue/Green--Hybrid--Van Wyke, Trudy--NR--
'Owen Online'LargeDark-GreenMedialYellowSportMed-LavenderJulySnyder, Ron.1998
'Owens Outrage'MediumLight-Green--UnknownMed-Lavender-Moore, Jeff--NR--
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