| No. | Cultivar Name | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Kanzi' | Med-Green | Marginal | Yellow | Sport | Med-Lavender | July into August | Wittebol, R. & Van Eechaute, Danny | --NR-- |
|
2
| 'Kathy Sorensen' | Blue/Green | Streaked | Speckles | Hybrid | Med-Lavender | June into July | Gilligan, Madelon | .2015 |
|
3
| 'Katrina Jo' | Med-Green | | - | Hybrid | Deep-Purple | August | Nyikos, Frank | .1998 |
|
4
| 'Kelsey' | Med-Green | | - | Hybrid | Pale-Lavender | August September October | Williams, Frances & Ruh, Peter | .1996 |
|
5
| 'Kempen Magenta Blue' | Blue/Green | | - | Hybrid | Unknown | - | Butaye, Patrick | --NR-- |
|
6
| 'Kenny Love Blue' | Blue/Green | | - | Unknown | Unknown | June into July | Wade, Van & Walek, Kevin & The American Hosta Society | .2009 |
|
7
| 'Kerry Man' | Blue/Green | | - | Sport | Near-White | June into July | Gilligan, Madelon | .2015 |
|
8
| 'Kettle Moraine' | Dark-Green | | | Unknown | Med-Lavender | June into July | Geske, Bob & Geske, Justin | .2022 |
|
9
| 'Kim' | Blue/Green | | - | Hybrid | Unknown | June into July | Kwick, Charles | .2016 |
|
10
| 'Kimmie Q' | Blue/Green | | - | Hybrid | Near-White | June into July | Kwick, Charles | .2017 |
|
11
| 'Kinba' | Med-Green | | - | Hybrid | Light-Purple | August to September | Watanabe, Kenji & Walek, Kevin & The American Hosta Society | .2009 |
|
12
| 'Kind of Blue' | Blue/Green | | - | Unknown | Unknown | July | Ward, Dr Dick & Ward, Jane | .1999 |
|
13
| 'King Cobra' | Light-Green | | - | Hybrid | Pale-Lavender | June into July | Scheer, Alttara & Gilligan, Madelon | .2015 |
|
14
| 'King Tucker' | Dark-Green | | - | Hybrid | Unknown | August to September | Kwick, Charles | .2016 |
|
15
| 'Kishiro-chirishimafu' | Dark-Green | | - | Sport | Light-Purple | June into July | Unknown | --NR-- |
|
16
| 'Kiwi Jordan' | Blue/Green | | - | Unknown | Light-Purple | August | Sligh, Barry | .2000 |
|
17
| 'Kiyosumi Seiryu' | Dark-Green | Streaked | White | Unknown | Pale-Lavender | - | Unknown | --NR-- |
|
18
| 'Kiyosumiensis Maiohgi' | Yellow | Marginal | Green | Nat-Sport | Pale-Lavender | - | Sugita, Hajime | --NR-- |
|