| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Kaboom' | Large | Med-Green | | | Hybrid | Light-Purple | | White, Jeff | --NR-- |
|
2
| 'Kaiapoi' | Giant | Blue/Green | - | - | Hybrid | Near-White | June into July | Gilligan, Madelon | .2012 |
|
3
| 'Katsuragawa Beni' | Medium | Med-Green | - | - | Unknown | Light-Purple | August to October | Masoka, Hiroshi | --NR-- |
|
4
| 'Kayla Marie' | Medium | Med-Green | Streaked | White | Unknown | - | June into July | Boak, Tim | .2012 |
|
5
| 'Kempen Golf Sticks' | Large | Med-Green | - | - | Unknown | - | - | Butaye, Patrick | --NR-- |
|
6
| 'Kempen Light Goalkeeper' | Large | Light-Green | | | Unknown | | | Butaye, Patrick | --NR-- |
|
7
| 'Kempen Manta Ray' | Small | Blue/Green | | | Unknown | | | Butaye, Patrick | --NR-- |
|
8
| 'Kempen Red Twist' | Large | Med-Green | Streaked | White | Hybrid | Pale-Lavender | July into August | Butaye, Patrick | .2014 |
|
9
| 'Kempen Rhubarb Taste' | Large | Med-Green | - | - | Unknown | - | - | Butaye, Patrick | --NR-- |
|
10
| 'Kempen Saw Blade' | Medium | Med-Green | Streaked | White | Hybrid | - | July | Butaye, Patrick | --NR-- |
|
11
| 'Kempen Waving Shadow' | Medium | Light-Green | - | - | Hybrid | - | - | Butaye, Patrick | --NR-- |
|
12
| 'Kichou' | Small | Med-Green | Streaked | Yellow | Unknown | - | - | Tanaka, Katsuyoshi | --NR-- |
|
13
| 'Kifukurin Ki Hachijo' (Japan) | Small | Med-Green | Marginal | Yellow | Sport | Med-Lavender | September | Unknown | --NR-- |
|
14
| 'Kill Me Softly' | Small | Dark-Green | - | - | Unknown | - | - | Scheer, Alttara | --NR-- |
|
15
| 'Kim She' | Small | Med-Green | Marginal | Yellow | Hybrid | - | August | Avent, Tony | --NR-- |
|
16
| 'Kinba' | Large | Med-Green | - | - | Hybrid | Light-Purple | August to September | Watanabe, Kenji & Walek, Kevin & The American Hosta Society | .2009 |
|
17
| 'King Cobra' | Medium | Light-Green | - | - | Hybrid | Pale-Lavender | June into July | Scheer, Alttara & Gilligan, Madelon | .2015 |
|
18
| 'King Crimson' | Medium | Med-Green | - | - | Unknown | - | - | Unknown | --NR-- |
|
19
| 'Kinugawa Nishiki Iwa' | Small | Med-Green | Medial | Yellow | Sport | Light-Purple | August to September | Suzuki, Kichigoro | --NR-- |
|
20
| 'Kiwi Red Heron' | Large | Blue/Green | - | - | Unknown | - | - | Sligh, Barry | --NR-- |
|
21
| 'Kofuki Iwa Giboshi' | Medium | Light-Green | - | - | Unknown | Light-Purple | September | Maekawa, Dr Fumio | --NR-- |
|
22
| 'Kogarashi Nakafu' | Miniature | Med-Green | Medial | Yellow | Sport | Med-Lavender | September | Unknown | --NR-- |
|
23
| 'Kosasa Nishiki Iwa' | Small | Med-Green | Streaked | Yellow | Unknown | Pale-Lavender | - | Kosasa | --NR-- |
|
24
| 'Kozu Nishiki' | Medium | Med-Green | - | - | Sport | Med-Lavender | September | Unknown | --NR-- |
|
25
| 'Kufikiu Iwa' | Medium | Med-Green | | | Unknown | | | Unknown | --NR-- |
|
26
| 'Kwick's White Pine View' | Medium | Yellow-Gold | | | Hybrid | Near-White | June into July | Kwick, Charles | .2022 |
|