| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Ian's Crystal Ball' | Small | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | June into July | Chrystal, Ian & Colley, June & Baker, John | .2020 |
| 'Ice King' | Small | Dark-Green | Medial | White | Sport | Near-White | July | Kwick, Charles | .2019 |
| 'I'll Fly Away' | Medium | Blue/Green | | | Hybrid | Near-White | June into July | McDonell, Harold | .2021 |
| 'I'm the Mom' | Medium | Blue/Green | Streaked | Yellow | Unknown | | | Ziarek, Ken | --NR-- |
| 'Imperial Majesty' | Large | Med-Green | - | - | Hybrid | Pale-Lavender | August | Sellers, Van & Ruh, Peter | .2003 |
| 'Imperial Palace' | Large | Dark-Green | Medial | Yellow | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Ward, Jane | .2009 |
| 'Inca Sun' | Large | Yellow | - | - | Unknown | Near-White | June into July | Goodwin, Randy | .2000 |
| 'Invocation' | Large | Light-Green | Marginal | White | Hybrid | Near-White | July into August | Lysne, Rod | .2021 |
| 'Irish Moss' | Medium | Med-Green | - | - | Unknown | Pale-Lavender | July | Deckert, Emile & Deckert, Jane | .2004 |
| 'Irish Ribbons' | Small | Light-Green | Marginal | White | Unknown | - | - | Kiehne, Myrtle & Anderson, Kenneth | .1992 |
| 'Island Fling' | Medium | Blue/Green | Marginal | Yellow | Sport | - | July into August | Blake, Amanda | .2016 |
| 'Island Heartbreaker' | Large | Blue/Green | - | - | Unknown | - | July into August | Blake, Amanda | .2016 |
| 'Iwa Soules' | Large | Med-Green | - | - | Sport | Light-Purple | August to September | Soules, Marjorie & Walek, Kevin | .2009 |
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