| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Kaiapoi' | Giant | Blue/Green | - | - | Hybrid | Near-White | June into July | Gilligan, Madelon | .2012 |
| 'Kaitlyn' | Large | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | June | Ward, Dr Dick & Ward, Jane | .1998 |
| 'Karamoosh' | Large | Dark-Green | Marginal | White | Hybrid | Med-Lavender | July into August | Kuk, Bob | .2008 |
| 'Kasseler Blue' | Medium | Blue/Green | - | - | Unknown | - | - | Klose, Heinz & Ruh, Peter & Ruh, Jean | .2008 |
| 'Kasseler Gold' | Medium | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Klose, Heinz & Ruh, Peter & Ruh, Jean | .2003 |
| 'Kate's Legacy' | Miniature | Dark-Green | Streaked | White | Sport | Med-Lavender | June into July | Rahe, Lora | .2010 |
| 'Kathy Sorensen' | Small | Blue/Green | Streaked | Speckles | Hybrid | Med-Lavender | June into July | Gilligan, Madelon | .2015 |
| 'Keel' | Giant | Blue/Green | - | - | Hybrid | Near-White | June into August | Gilligan, Madelon | .2012 |
| 'Kempen Red Twist' | Large | Med-Green | Streaked | White | Hybrid | Pale-Lavender | July into August | Butaye, Patrick | .2014 |
| 'Kempen Sky High' | Medium | Blue/Green | - | - | Hybrid | Light-Purple | July into August | Butaye, Patrick | .2015 |
| 'Kerfuffle' | Medium | Light-Green | Marginal | Yellow | Sport | Light-Purple | July | Zilis, Mark | .2011 |
| 'Kermit' | Small | Med-Green | Marginal | White | Hybrid | Pale-Lavender | July into August | Lydell, Ransom | --NR-- |
| 'Kerry Man' | Giant | Blue/Green | - | - | Sport | Near-White | June into July | Gilligan, Madelon | .2015 |
| 'Key Largo' | Medium | Med-Green | Streaked | Yellow | Sport | - | - | Malloy, Alex | --NR-- |
| 'Ki Nakafu Otome' | Miniature | Light-Green | Marginal | Green | Unknown | Deep-Purple | June into July | Unknown & Zilis, Mark | .2003 .2018 |
| 'Kickapoo Krinkles' | Medium | Med-Green | Streaked | Yellow | Sport | Near-White | June into July | Goodwin, Randy | .2013 |
| 'Kinba' | Large | Med-Green | - | - | Hybrid | Light-Purple | - | Watanabe, Kenji | --NR-- |
| 'King Cobra' | Medium | Light-Green | - | - | Hybrid | Pale-Lavender | June into July | Scheer, Alttara & Gilligan, Madelon | .2015 |
| 'Kinky Boots' | Medium | Blue/Green | Marginal | White | Sport | Pale-Lavender | July into August | Dean, Don | .2014 |
| 'Kinugawa Nishiki Iwa' | Small | Med-Green | Medial | Yellow | Sport | Light-Purple | August to September | Suzuki, Kichigoro | --NR-- |
| 'Kiowa' | Medium | Blue/Green | Medial | Yellow | Sport | Near-White | June into July | Goodwin, Randy | .2013 |
| 'Kiss Me Farewell' | Medium | Yellow | - | - | Hybrid | - | June into July | Kwick, Charles | .2016 |
| 'Kissing Cousin' | Medium | Blue/Green | Marginal | White | Sport | Pale-Lavender | July into August | Elslager, Ed | .1998 |
| 'Kisuji' | Medium | Light-Green | Streaked | Yellow | Sport | Light-Purple | August | Unknown | --NR-- |
| 'Kiwi Cream Edge' | Medium | Yellow | Marginal | White | Unknown | - | July into August | Jury, Felix & Walek, Kevin | .2009 |
| 'Kiwi Dotterel' | Large | Light-Green | Marginal | White | Sport | Pale-Lavender | July into August | Sligh, Barry | --NR-- |
| 'Kiwi Ice Breaker' | - | Med-Green | Medial | Yellow | Unknown | - | - | Sligh, Barry | --NR-- |
| 'Kiwi Tease' | Large | Med-Green | Marginal | White | Sport | Pale-Lavender | July into August | Sligh, Barry | .2000 |
| 'Knit Pickin' | Medium | Dark-Green | - | - | Hybrid | Med-Lavender | July | Zolock, Steve & Zolock, Sarah | .2010 |
| 'Kogasiyama Fukurin' | Small | Med-Green | Marginal | White | Unknown | Med-Lavender | - | Unknown | --NR-- |
| 'Koneko' | Large | Med-Green | Marginal | White | Unknown | Light-Purple | July | Olson, Dr Robert | .1999 |
| 'Korean Snow' | Medium | Med-Green | Streaked | Creamy White | Hybrid | Light-Purple | August | Niche Gardens & Solberg, Robert | .1999 |
| 'Koyurugi' | Medium | Med-Green | Streaked | Speckles | Hybrid | - | - | Onoda | --NR-- |
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