Cultivar NameSourcePlant SizeLeaf ColorVariegationVar ColorOriginFlower ColorSeasonRegistered
'Oasis'Ward, Dr Dick & JaneLargeBlue/Green--UnknownNear-WhiteJune into July.2012
'Ocean Tide'Mondt, ManfredLargeBlue/Green--HybridNear-WhiteJune into July--NR--
'Oceans Away'Hanson, CurtGiantBlue/Green--Unknown-June into July--NR--
'Odina'Wade, VanLargeBlue/Green--Unknown----NR--
'Og, Son of Fire'Beilstein, Doug & Malloy, AlexMiniatureMed-GreenMarginalWhiteHybrid----NR--
'Oglala'Wade, VanGiantBlue/Green--Unknown----NR--
'Ohio Blue'Wade, Van-Blue/Green--Unknown----NR--
'Ohio River'Beilstein, Doug & Malloy, AlexMediumMed-Green--Hybrid----NR--
'Ojibway'Wade, VanMediumBlue/Green--Unknown----NR--
'Old Hump Back'Wade, VanLargeDark-Green--HybridPale-LavenderJune into July.1999
'Old Rough House'Wade, VanGiantBlue/Green--Unknown----NR--
'Olga Gibosa'Wade, VanLargeMed-Green--UnknownLight-PurpleJuly into August--NR--
'Olga's Shiny Leaf'Thiemann, Olga & Ruh, Peter & JeanSmallDark-Green--Nat-SportMed-Lavender-.2004
'Olive Branch'Moldovan, Steve & Ruh, Peter & JeanMediumMed-GreenMedialYellowTC SportPale-LavenderJuly.2008
'Omaha'Wade, VanLargeBlue/Green--Unknown----NR--
'On the Border'Beilstein, DougMediumMed-GreenMarginalWhiteHybridPale-LavenderAugust.2007
'One and Only'Ward, Dr Dick & JaneLargeYellow--HybridPale-LavenderJune into July.2015
'One Fine Day'Ward, Dr Dick & JaneMediumMed-GreenMarginalYellowHybridNear-WhiteJune into July.2012
'Oneida'Wade, VanMediumMed-Green--Unknown----NR--
'Only You'Ward, Dr Dick & JaneMediumMed-GreenMarginalWhiteHybrid--.2012
'Ontario Blue'Wade, VanLargeBlue/Green--Unknown----NR--
'Open Hearted'Wade, VanGiantBlue/Green--Unknown-July.1999
'Oracle'Ward, Dr Dick & JaneGiantMed-Green--Unknown-June into July.2003
'Oriana'Wade, Van-Yellow--Nat-Sport----NR--
'Orion's Belt'Ward, Dr Dick & JaneLargeBlue/Green--UnknownPale-LavenderJuly.2003
'Ottawa'Wade, VanLargeMed-Green--Unknown----NR--
'Ovalwood'Beilstein, Doug & MardyLargeBlue/Green--HybridNear-WhiteJuly.2012
'Over the Moon'Ward, Dr Dick & JaneMediumMed-GreenMarginalWhiteHybrid-June into July.2010

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