| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Season | Source | Registered |
| 'Ka-ching' | Giant | Dark-Green | - | - | Unknown | June into July | Zolock, Steve & Sarah | .2011 |
| 'Kaiapoi' | Giant | Blue/Green | - | - | Hybrid | June into July | Gilligan, Madelon | .2012 |
| 'Kaitlyn' | Large | Med-Green | Marginal | Yellow | Hybrid | June | Ward, Dr Dick & Jane | .1998 |
| 'Karen Deborah' | Giant | Blue/Green | - | - | Unknown | June | Simpers, Lucille | --NR-- |
| 'Karen's Delight' | Medium | Yellow | Marginal | White | Nat-Sport | June into July | Sully, Marcia | .2014 |
| 'Kasahara Nishiki' | Medium | Med-Green | Streaked | Speckles | Nat-Sport | June into July | Unknown | --NR-- |
| 'Kasseler Gold' | Medium | Yellow | - | - | Hybrid | June into July | Klose, Heinz & Ruh, Peter & Jean | .2003 |
| 'Kate's Legacy' | Miniature | Dark-Green | Streaked | White | Nat-Sport | June into July | Rahe, L. | .2010 |
| 'Kathy Sorensen' | Small | Blue/Green | Streaked | Speckles | Hybrid | June into July | Gilligan, Madelon | .2015 |
| 'Katie Q' | Medium | Blue/Green | Marginal | Yellow | TC Sport | June | Zilis, Mark | .2003 |
| 'Kayla Marie' | Medium | Med-Green | Streaked | White | Unknown | June into July | Boak, Tim | .2012 |
| 'Keel' | Giant | Blue/Green | - | - | Hybrid | June into August | Gilligan, Madelon | .2012 |
| 'Keepsake' | Small | Med-Green | Marginal | Yellow | Hybrid | June into July | Jones, Gil | .2007 |
| 'Kelly' | Large | Blue/Green | - | - | Nat-Sport | June into July | Scolnik, Patricia & Walek, Kevin | .2009 |
| 'Kempton Run' | Medium | Med-Green | Marginal | White | Hybrid | June into July | Ward, Dr Dick & Jane | .2011 |
| 'Kenny Love Blue' | Large | Blue/Green | - | - | Unknown | June into July | Wade, Van & Walek, Kevin | .2009 |
| 'Kenny's Bob' | Small | Light-Green | Marginal | White | Unknown | June into July | Frederick, Ken & Peterzen, P. | .2012 |
| 'Kerry Man' | Giant | Blue/Green | - | - | Nat-Sport | June into July | Gilligan, Madelon | .2015 |
| 'Keuka Love' | Large | Blue/Green | Marginal | Yellow | Nat-Sport | June into July | McElwee, Molly | .2002 |
| 'Kevin Vaughn' | Medium | Med-Green | Streaked | White | Nat-Sport | June into July | Lachman, Wm & Eleanor | --NR-- |
| 'Key West' | Giant | Yellow | - | - | Hybrid | June into July | Petryszyn, Olga | .1999 |
| 'Ki Nakafu Otome' | Miniature | Light-Green | Marginal | Green | Unknown | June into July | Unknown & Zilis, Mark | .2003 .2018 |
| 'Kickapoo Krinkles' | Medium | Med-Green | Streaked | Yellow | Nat-Sport | June into July | Goodwin, Randy | .2013 |
| 'Kim' | Giant | Blue/Green | - | - | Hybrid | June into July | Kwick, Charles | .2016 |
| 'Kimmie Q' | Giant | Blue/Green | - | - | Hybrid | June into July | Kwick, Charles | .2017 |
| 'King Cobra' | Medium | Light-Green | - | - | Hybrid | June into July | Scheer, Alttara & Gilligan, Madelon | .2015 |
| 'King James' | Large | Med-Green | - | - | Hybrid | June into July | Krossa, Gus & Ruh, Peter | .1992 |
| 'King Michael' | Giant | Med-Green | - | - | Hybrid | June | Krossa, Gus & Summers, Alex & Ruh, Peter | .1992 |
| 'King Tut' | Large | Yellow | - | - | Hybrid | June into July | Harshbarger, Gretchen | .1982 |
| 'Kingsize' | Giant | Dark-Green | - | - | Nat-Sport | June | Van Eechaute, Danny | .2013 |
| 'Kiowa' | Medium | Blue/Green | Medial | Yellow | Nat-Sport | June into July | Goodwin, Randy | .2013 |
| 'Kishiro-chirishimafu' | Medium | Dark-Green | - | - | Nat-Sport | June into July | Unknown | --NR-- |
| 'Kiss Me Farewell' | Medium | Yellow | - | - | Hybrid | June into July | Kwick, Charles | .2016 |
| 'Kiss Me Kwick' | Small | Yellow | - | - | Hybrid | June into July | Kwick, Charles | .2016 |
| 'Kiss Me Kwick and Don't Slobber' | Large | Light-Green | - | - | Hybrid | June into July | Kwick, Charles | .2017 |
| 'Kit Kat' | Large | Light-Green | - | - | Nat-Sport | June into July | Smetana, Don | .1994 |
| 'Kiwi Blue Heron' | Large | Blue/Green | - | - | TC Sport | June into July | Sligh, Barry | --NR-- |
| 'Kiwi Blue Ruffles' | Large | Blue/Green | - | - | Hybrid | June | Sligh, Barry | .1999 |
| 'Kiwi Blue Sky' | Small | Blue/Green | - | - | Hybrid | June into July | Sligh, Barry | .1999 |
| 'Kiwi Blue Sunrise' | Large | Blue/Green | Marginal | Yellow | Nat-Sport | June into July | Sligh, Barry | .1999 |
| 'Kiwi Canoe' | Medium | Blue/Green | - | - | Hybrid | June into July | Sligh, Barry | .1999 |
| 'Kiwi Forest' | Large | Dark-Green | - | - | Nat-Sport | June into July | Sligh, Barry | .1999 |
| 'Kiwi Ingenuity' | Giant | Blue/Green | Streaked | Yellow | Nat-Sport | June into July | Sligh, Barry | --NR-- |
| 'Kiwi Lemon Twist' | Large | Yellow | Marginal | Green | Nat-Sport | June into July | Sligh, Barry | --NR-- |
| 'Kiwi Milky Way' | Large | Blue/Green | - | - | Nat-Sport | June into July | Sligh, Barry | .2000 |
| 'Kiwi Pacific Blue' | Medium | Blue/Green | - | - | Hybrid | June | Sligh, Barry | .1999 |
| 'Kiwi Parasol' | Large | Med-Green | - | - | Nat-Sport | June | Sligh, Barry | .1999 |
| 'Kiwi Sunshine' | Large | Yellow | - | - | Hybrid | June | Sligh, Barry | .1999 |
| 'Klaus von Klitzing' | Large | Dark-Green | Medial | Light Green | Unknown | June | Braun-Nauerz, Gaby | .2003 |
| 'Klingon' | Medium | Dark-Green | - | - | Nat-Sport | June into July | Zilis, Mark & Schwarz, Jim | --NR-- |
| 'Knockout' | Medium | Med-Green | Marginal | Creamy White | Hybrid | June into July | Aden, Paul | .1986 |
| 'Komodo Dragon' | Large | Med-Green | - | - | Hybrid | June | Seaver, Mildred | .2004 |
| 'Kong' | Large | Med-Green | - | - | Hybrid | June into July | Soules, Clarence | .1990 |
| 'Krinkled Joy' | Large | Blue/Green | - | - | Hybrid | June into July | Arett, Anne & Armstrong, Maxine & AHS | .1986 |
| 'Kris Krinkle' | Large | Blue/Green | - | - | Hybrid | June into July | Postlewaite, Peter | .2013 |
| 'Kristie's Key Lime Pie' | Large | Yellow | - | - | Unknown | June | Unknown | --NR-- |
| 'Kwickie' | Medium | Yellow | - | - | Hybrid | June into July | Kwick, Charles | .2017 |
| 'Kwick's Salad Bowl' | Large | Med-Green | - | - | Hybrid | June into July | Kwick, Charles | .2017 |
| 'Kyokkou' | Miniature | Dark-Green | Medial | Yellow | Unknown | June into July | Unknown | --NR-- |
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