| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Ice Age Trail' | Large | Blue/Green | Streaked | Yellow | Nat-Sport | Near-White | June | Zilis, Mark | .2003 |
| 'Ice Palace' | Medium | Blue/Green | - | - | Hybrid | Near-White | June | Ward, Dr Dick & Jane | .2003 |
| 'Ichi-ban' | Miniature | Med-Green | Medial | White | Hybrid | Light-Purple | July | Unknown & Zilis, Mark | .2003 |
| 'Illicit Affair' | Small | Med-Green | Marginal | Yellow | Nat-Sport | Light-Purple | July | Anderson, Jim | .2003 |
| 'I'm My Kid's Mom' | Medium | Med-Green | Streaked | White | Hybrid | Pale-Lavender | July into August | Elslager, Ed | .2003 |
| 'I'm So Pretty' | Large | Blue/Green | - | - | Nat-Sport | Pale-Lavender | July | Schwarz, Jim | .2003 |
| 'Imperial Majesty' | Large | Med-Green | - | - | Hybrid | Pale-Lavender | August | Sellers, Van & Ruh, Peter | .2003 |
| 'Iva Delight' | Medium | Med-Green | Medial | White | Nat-Sport | Pale-Lavender | July into August | Lisik, Philip | .2003 |
| 'Ivory Necklace' | Medium | Med-Green | Marginal | White | TC Sport | Light-Purple | July | Zilis, Mark | .2003 |
| 'Ivy Parody' | Medium | Blue/Green | Marginal | White | Nat-Sport | Pale-Lavender | July into August | Braun-Nauerz, Gaby & Warmerdam, Piet | .2003 |
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