| No. | Cultivar Name | Source | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Registered |
|
1
| 'I Dream of Jeanne' | Barbee, T.R. (Dick) | Large | Yellow | - | - | Hybrid | Pure-White | June into July | .2017 |
|
2
| 'I Got Rhythm' | Ward, Dr Dick & Ward, Jane | Large | Med-Green | Marginal | Yellow | Hybrid | - | June into July | .2009 |
|
3
| 'Ice Crystals' | Klotz, Ruby & Klotz, B. | Medium | Yellow | Marginal | White | Unknown | Pale-Lavender | July | .2020 |
|
4
| 'Ice Palace' | Ward, Dr Dick & Ward, Jane | Medium | Blue/Green | - | - | Hybrid | Near-White | June | .2003 |
|
5
| 'Immense' | Ruh, Peter | Giant | Dark-Green | - | - | Hybrid | Near-White | July | .1991 |
|
6
| 'Imperial Palace' | Ward, Dr Dick & Ward, Jane | Large | Dark-Green | Medial | Yellow | Hybrid | Pale-Lavender | June into July | .2009 |
|
7
| 'Independence Day' | Wade, Van | Giant | Med-Green | Marginal | Yellow | Sport | Pale-Lavender | July | .1998 |
|
8
| 'Indianapolis Blue' | Wade, Van | Large | Blue/Green | - | - | Hybrid | Near-White | June into July | .2007 |
|
9
| 'Inniswood' | Innis Metro Gardens | Medium | Yellow | Marginal | Green | Sport | Pale-Lavender | June | .1993 |
|
10
| 'Instant Gratification' | Beilstein, Doug & Beilstein, Mardy | Small | Light-Green | Medial | White | Hybrid | Near-White | August | .2013 |
|
11
| 'Interstate 71' | Beilstein, Doug & Zilis, Mark | Large | Blue/Green | - | - | Sport | Pale-Lavender | June into July | .2009 |
|
12
| 'Intrigue Green' | Wade, Van | Large | Med-Green | - | - | Sport | Med-Lavender | July | --NR-- |
|
13
| 'Irish Coast' | Zumbar, Wm | Small | - | - | - | Unknown | - | - | --NR-- |
|
14
| 'Irish Eyes' | Ward, Dr Dick & Ward, Jane | Medium | Med-Green | Marginal | Creamy White | Hybrid | Pale-Lavender | - | .1999 |
|
15
| 'Irish Fling' | Ward, Dr Dick & Ward, Jane | Small | Med-Green | Marginal | Yellow | Hybrid | Near-White | July | .2012 |
|
16
| 'Irish Jig' | Ward, Dr Dick & Ward, Jane | Medium | Dark-Green | Marginal | White | Hybrid | Near-White | July into August | .2012 |
|
17
| 'Iron Gate Supreme Green' | Wade, Van | Large | Med-Green | - | - | Sport | Pale-Lavender | August | --NR-- |
|
18
| 'Iroquois' | Wade, Van | Large | Blue/Green | - | - | Hybrid | Near-White | July | .2007 |
|
19
| 'Island Forest' | Hatfield, Handy | Large | Med-Green | - | - | Unknown | Med-Lavender | July | --NR-- |
|
20
| 'Ivanhoe' | Beilstein, Doug & Malloy, Alex | Medium | Med-Green | Marginal | White | Hybrid | - | - | --NR-- |
|
21
| 'Ivory Tower' | Ward, Dr Dick & Ward, Jane | Giant | Yellow | - | - | Hybrid | Near-White | June into July | .1996 |
|