No.Cultivar NameSourcePlant SizeLeaf ColorVariegationVar ColorOriginFlower ColorSeasonRegistered
1 'Oasis' (Ward)Ward, Dr Dick & Ward, JaneLargeBlue/Green--UnknownNear-WhiteJune into July.2012
2 'Ocean Tide'Mondt, ManfredLargeBlue/Green--HybridNear-WhiteJune into July--NR--
3 'Oceans Away'Hanson, CurtGiantBlue/Green--Unknown-June into July--NR--
4 'Odina'Wade, VanLargeBlue/Green--Unknown----NR--
5 'Og, Son of Fire'Beilstein, Doug & Malloy, AlexMiniatureMed-GreenMarginalWhiteHybrid----NR--
6 'Oglala'Wade, VanGiantBlue/Green--Unknown----NR--
7 'Ohio Blue'Wade, Van-Blue/Green--Unknown----NR--
8 'Ohio River'Beilstein, Doug & Malloy, AlexMediumMed-Green--Hybrid----NR--
9 'Ojibway'Wade, VanMediumBlue/Green--Unknown----NR--
10 'Old Hump Back'Wade, VanLargeDark-Green--HybridPale-LavenderJune into July.1999
11 'Old Rough House'Wade, VanGiantBlue/Green--Unknown----NR--
12 'Olga Gibosa'Wade, VanLargeMed-Green--UnknownLight-PurpleJuly into August--NR--
13 'Olga's Shiny Leaf'Thiemann, Olga & Ruh, Peter & Ruh, JeanSmallDark-Green--SportMed-Lavender-.2004
14 'Olive Branch'Moldovan, Steve & Ruh, Peter & Ruh, JeanMediumMed-GreenMedialYellowTC SportPale-LavenderJuly.2008
15 'Omaha'Wade, VanLargeBlue/Green--Unknown----NR--
16 'On the Border'Beilstein, DougMediumMed-GreenMarginalWhiteHybridPale-LavenderAugust.2007
17 'One and Only'Ward, Dr Dick & Ward, JaneLargeYellow--HybridPale-LavenderJune into July.2015
18 'One Fine Day'Ward, Dr Dick & Ward, JaneMediumMed-GreenMarginalYellowHybridNear-WhiteJune into July.2012
19 'Oneida'Wade, VanMediumMed-Green--Unknown----NR--
20 'Only You'Ward, Dr Dick & Ward, JaneMediumMed-GreenMarginalWhiteHybrid--.2012
21 'Ontario Blue'Wade, VanLargeBlue/Green--Unknown----NR--
22 'Open Hearted'Wade, VanGiantBlue/Green--Unknown-July.1999
23 'Oracle'Ward, Dr Dick & Ward, JaneGiantMed-Green--Unknown-June into July.2003
24 'Orion's Belt'Ward, Dr Dick & Ward, JaneLargeBlue/Green--HybridPale-LavenderJuly.2003
25 'Ottawa'Wade, VanLargeMed-Green--Unknown----NR--
26 'Ovalwood'Beilstein, Doug & Beilstein, MardyLargeBlue/Green--HybridNear-WhiteJuly.2012
27 'Over the Moon'Ward, Dr Dick & Ward, JaneMediumMed-GreenMarginalWhiteHybrid-June into July.2010

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