| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Calico Mouse Ears' | Miniature | Med-Green | Streaked | White | TC Sport | Light-Purple | July | Zilis, Mark | .2012 |
| 'Campfire' | Medium | Blue/Green | Streaked | Yellow | Sport | Med-Lavender | August | Zilis, Mark | .2011 |
| 'Canary Diamond' | Medium | Yellow | - | - | Unknown | - | - | Vincun, Rachel | --NR-- |
| 'Cardboard' | Medium | Med-Green | - | - | Unknown | Pure-White | July into August | Livingston, Ron | --NR-- |
| 'Carin's Wedding' | Small | Med-Green | Streaked | White | Unknown | Light-Purple | July into August | Musak, Don & Zilis, Mark | .2012 |
| 'Carolina Keepsake' | Small | Yellow | - | - | Hybrid | - | August to September | Solberg, Robert | .2016 |
| 'Carry On' | Small | Med-Green | Marginal | White | Sport | Light-Purple | July into August | Mortko, Rob | .2013 |
| 'Carved Complexity' | Large | Yellow | - | - | Hybrid | Near-White | June into July | McDonell, Harold | .2014 |
| 'Cathy's Clown' (Wasitis) | Medium | Med-Green | Marginal | White | Unknown | - | June into July | Wasitis, Chick | .2011 |
| 'Cease Fire' | Large | Blue/Green | Marginal | White | TC Sport | Pale-Lavender | July into August | Schwarz, Jim & Schwarz, Karen & Zilis, Mark | .2014 |
| 'Celtic Bouquet' | Large | Med-Green | - | - | Hybrid | - | June into July | Dean, Don | .2011 |
| 'Celtic Dancer' | Medium | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Dean, Don | .2008 |
| 'Cemetery Road' | Large | Med-Green | Streaked | White | Hybrid | Light-Purple | August to September | Kuenster, Rod | .2011 |
| 'Champ' | Giant | Med-Green | - | - | Hybrid | - | June into July | Kwick, Charles | .2016 |
| 'Champagne for All' | Medium | Dark-Green | Medial | White | Sport | Pale-Lavender | July into August | Van Eechaute, Danny | .2015 |
| 'Changing Light' | Large | Med-Green | Marginal | Yellow | Sport | Med-Lavender | July into August | Skaggs, Virginia & Skaggs, Brian | --NR-- |
| 'Charity' | Medium | Dark-Green | Marginal | White | Sport | - | June into July | Silvers, Bill | .2011 |
| 'Charlotte's Web' | Small | Med-Green | Streaked | Yellow | Sport | Light-Purple | July | Beilstein, Doug & Zilis, Mark | .2009 |
| 'Chart Topper' | Medium | Blue/Green | - | - | Sport | Pale-Lavender | July into August | Zilis, Mark | --NR-- |
| 'Cheese Louise' | Large | Light-Green | - | - | Unknown | - | - | Hackbarth, Robert | .2015 |
| 'Chesieres Mountain Lights' | Large | Med-Green | Medial | Yellow | Sport | Pale-Lavender | July into August | Hirsbrunner, Liselotte | .2001 |
| 'Chickenhearted' | Medium | Light-Green | - | - | Hybrid | Pure-White | July into August | Groothuis, Mike | .2012 |
| 'Chippewa' (Wade) | Giant | Blue/Green | - | - | Hybrid | Pale-Lavender | July into August | Wade, Van | --NR-- |
| 'Chirifu Ogon Himetokudama' | Medium | Med-Green | Marginal | - | Sport | Pale-Lavender | June into July | Unknown | --NR-- |
| 'Chishima Iwa' | Miniature | Med-Green | - | - | Sport | Pale-Lavender | - | Unknown | --NR-- |
| 'Chocolate Mint' | Small | Dark-Green | - | - | Sport | Light-Purple | August to October | Schwarz, Karen & Zilis, Mark | .2014 |
| 'Chodai Ginba' | Medium | Dark-Green | - | - | Unknown | Pale-Lavender | July | Kajigawa & Ruh, Peter | .2003 .2018 |
| 'Chodai Ginyo' | Large | Blue/Green | - | - | Sport | Med-Lavender | July into August | Unknown | --NR-- |
| 'Chris' | Large | Yellow | - | - | Unknown | - | June into July | Schwarz, Jim & Schwarz, Karen | .2014 |
| 'Christmas Surprise' | Small | Dark-Green | Marginal | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Christmas White' | Small | Dark-Green | Medial | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Chromosphere' | Medium | Yellow | - | - | Hybrid | - | July into August | Zilis, Mark | .2010 |
| 'Chuck's Sweetheart' | Small | Med-Green | - | - | Unknown | Med-Lavender | - | Purtymun, Charles | .2009 |
| 'Cinnamon and Sugar' | Medium | Med-Green | - | - | Unknown | - | - | Herold, Roy | --NR-- |
| 'Circular Saw' | Medium | Med-Green | Marginal | Yellow | TC Sport | - | July into August | Zilis, Mark | .2009 |
| 'Citratini' | Small | Med-Green | - | - | Hybrid | - | August | Zilis, Mark | .2009 |
| 'City Dog' | Medium | Med-Green | Marginal | White | Sport | Pale-Lavender | June into July | Van Eechaute, Danny | .2014 |
| 'Cloud Nine' | Giant | Med-Green | Streaked | Yellow | Sport | Med-Lavender | July | Trucks, Gary | --NR-- |
| 'Coach Terry Paustian' | Small | Med-Green | Streaked | Yellow | Hybrid | - | August to September | Freeman, Franc | .2010 |
| 'Coal Miner' | Small | Dark-Green | - | - | Hybrid | - | June into July | Petryszyn, Olga | .2010 |
| 'Coast to Coast' | Giant | Light-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Petryszyn, Olga | .2012 |
| 'Cobra's Lair' | Medium | Blue/Green | - | - | Hybrid | - | - | Philips, Hugo | .2010 |
| 'Colesburg Sonny Boy' | Large | Dark-Green | Medial | Yellow | Sport | Pale-Lavender | July into August | Hackbarth, Robert | .2015 |
| 'Colesburg Wiggles' | Medium | Med-Green | Marginal | Yellow | Unknown | Light-Purple | July into August | Hackbarth, Robert | .2015 |
| 'Collector's Gold' | Large | Yellow | - | - | Unknown | - | - | Janssen, Bill | --NR-- |
| 'Color Riot' | Small | Med-Green | Medial | White | Hybrid | - | - | Tompkins, Chet & Tompkins, Cynthia & Ruh, Peter | --NR-- |
| 'Colors in Motion' | Giant | Blue/Green | Streaked | White | Hybrid | Pale-Lavender | June into July | de Rooij, Piet | .2014 |
| 'Commander' | Large | Med-Green | Marginal | White | Hybrid | - | June into July | Zilis, Mark | .2010 |
| 'Compass Point' | Large | Blue/Green | Streaked | White | Unknown | Near-White | July into August | Seaver, Charles | .2004 |
| 'Con Te Partiro' | Small | Blue/Green | Marginal | White | Hybrid | Med-Lavender | July into August | Johnson, Greg | .2004 |
| 'Connie Sun' | Large | Yellow | - | - | Sport | Med-Lavender | July | Snyder, Ron | .2001 |
| 'Continental Divide' | Large | Dark-Green | Medial | Green | Hybrid | Near-White | June into August | Groothuis, Mike & Petryszyn, Olga | .2008 |
| 'Conundrum' | Giant | Blue/Green | - | - | Unknown | Med-Lavender | June into July | Gilligan, Madelon | .2012 |
| 'Convivial' | Medium | Dark-Green | Marginal | White | Unknown | Near-White | - | Livingston, Ron | --NR-- |
| 'Cool Dreams' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Zilis, Mark | .2010 |
| 'Cool Waters' | Medium | Blue/Green | - | - | Hybrid | Light-Purple | June into July | Zilis, Mark | .2010 |
| 'Coronation' | Large | Blue/Green | Marginal | Yellow | Unknown | Med-Lavender | June | Goodwin, Randy | .2006 |
| 'Corryvreckan' | Medium | Blue/Green | - | - | Unknown | - | - | Black, Gwen | --NR-- |
| 'Cosmic Breeder' | Large | Dark-Green | Streaked | Yellow | Hybrid | - | June into July | Kuenster, Rod | .2010 |
| 'Cosmic Charmer' | Large | Dark-Green | Streaked | Yellow | Hybrid | - | June into July | Kuenster, Rod | .2010 |
| 'Cosmic Delight' | Large | Light-Green | Streaked | White | Hybrid | Med-Lavender | June into July | Kuenster, Rod | .2010 |
| 'Cosmic Desire' | Large | Blue/Green | Streaked | Yellow | Hybrid | Pale-Lavender | July into August | Kuenster, Rod | .2013 |
| 'Cosmic Eye Candy' | Medium | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | June into July | Kuenster, Rod | .2014 |
| 'Cosmic Fantasy' | Large | Med-Green | Streaked | White | Hybrid | - | - | Kuenster, Rod | .2010 |
| 'Cosmic Knuckles' | Giant | Dark-Green | - | - | Hybrid | Near-White | July into August | Kuenster, Rod | .2015 |
| 'Cosmic Little Elf' | Miniature | Med-Green | Streaked | White | Hybrid | Pale-Lavender | July into August | Kuenster, Rod | .2011 |
| 'Cosmic Miss Fertile' | Large | Blue/Green | Streaked | Yellow | Hybrid | Pale-Lavender | July into August | Kuenster, Rod | .2013 |
| 'Cosmic Moon' | Large | Blue/Green | - | - | Hybrid | Near-White | July into August | Kuenster, Rod | .2015 |
| 'Cosmic Moonshine' | Large | Blue/Green | Streaked | Yellow | Hybrid | Med-Lavender | June into July | Kuenster, Rod | .2012 |
| 'Cosmic Paint Shaker' | Large | Blue/Green | Streaked | Yellow | Hybrid | Near-White | June into July | Kuenster, Rod | .2012 |
| 'Cosmic Passion' | Large | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July into August | Kuenster, Rod | .2011 |
| 'Cosmic Patchwork' | Medium | Med-Green | Streaked | Yellow | Hybrid | Near-White | June into July | Kuenster, Rod | .2014 |
| 'Cosmic Pistol' | Medium | Light-Green | Streaked | White | Hybrid | Near-White | July | Kuenster, Rod | .2012 |
| 'Cosmic Rain' | Large | Blue/Green | Streaked | Yellow | Hybrid | Pale-Lavender | August | Kuenster, Rod | .2013 |
| 'Cosmic Reaction' | Large | Light-Green | Streaked | Yellow | Hybrid | Med-Lavender | June into July | Kuenster, Rod | .2012 |
| 'Cosmic River' | Medium | Med-Green | Streaked | Yellow | Hybrid | Med-Lavender | July into August | Kuenster, Rod | .2011 |
| 'Cosmic Secret' | Medium | Blue/Green | Streaked | Yellow | Hybrid | Near-White | July into August | Kuenster, Rod | .2013 |
| 'Cosmic Shine' | Large | Dark-Green | - | - | Hybrid | Near-White | June into July | Kuenster, Rod | .2012 |
| 'Cosmic Smiles' | Large | Blue/Green | Streaked | Yellow | Hybrid | Med-Lavender | June into July | Kuenster, Rod | .2012 |
| 'Cosmic Warrior' | Medium | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | June into July | Kuenster, Rod | .2014 |
| 'Cosmic Watercolors' | Medium | Med-Green | Streaked | Yellow | Hybrid | Near-White | July into August | Kuenster, Rod | .2011 |
| 'Country Dreaming' | Large | Blue/Green | - | - | Hybrid | Pale-Lavender | July | Dean, Don | .2013 |
| 'Country Melody' | Large | Light-Green | - | - | Hybrid | Near-White | July into August | Dean, Don | .2013 |
| 'Cousin Lou Ann' | Large | Light-Green | - | - | Unknown | - | June into July | Zilis, Mark | .2010 |
| 'Cowabunga' | Large | Light-Green | Marginal | White | Unknown | - | - | Asch, Stuart | .2010 |
| 'Cracker Jack' | Small | Med-Green | Marginal | Yellow | TC Sport | Light-Purple | July into August | Zilis, Mark | .2011 |
| 'Crescendo' | Large | Blue/Green | - | - | Hybrid | Near-White | June into July | Kamp, Gayle | .2001 |
| 'Cricket' | Miniature | Med-Green | - | - | Sport | Pale-Lavender | June into July | Ward, Dr Dick & Ward, Jane | .2010 |
| 'Crow' | Medium | Dark-Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Cry Baby' | Small | Light-Green | Marginal | Green | Hybrid | Light-Purple | July | Jones, Leonard | .1999 |
| 'Curious Yellow' (Livingston) | Small | Yellow | - | - | Unknown | Light-Purple | - | Livingston, Ron | --NR-- |
| 'Cushing House 1808' | Large | Blue/Green | Marginal | Yellow | Sport | Med-Lavender | July into August | Lydell, Ransom | --NR-- |
| 'Cutie' | Medium | Blue/Green | - | - | Unknown | Med-Lavender | August to October | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
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