| Marginal Variegation | Plant Size | Leaf Color | Var Color | Origin | Season | Source | Registered |
| 'C. C. Ryder' | Medium | Blue/Green | White | Unknown | - | Stygall, Patsy & Crockett, Clyde | --NR-- |
| 'C.D.F.' | Medium | Light-Green | Green | Unknown | | Jentsch, Klaus | --NR-- |
| 'Cabaret' | Medium | Dark-Green | White | Sport | July into August | Hansen, Hans | --NR-- |
| 'Cadillac' | Medium | Yellow | Blue-Green | Unknown | July | Skrocki, Ed & Avent, Tony | .1998 |
| 'Caesar' | Medium | Yellow | Green | Sport | July | Malloy, Alex | .1999 |
| 'Cajun Surprise' | - | Yellow | Green | Unknown | - | Unknown | --NR-- |
| 'Caliban' | Giant | Yellow | Green | Sport | July into August | Scolnik, Patricia & Walek, Kevin | .2009 |
| 'California Dreamin' | Medium | Light-Green | Yellow | Unknown | - | Meyer, Bill & Brashear, Carol | --NR-- |
| 'California Gold Rush' | Large | Light-Green | Green | Sport | July | Zilis, Mark | .2010 |
| 'Call of the Wild' | Large | Blue/Green | Yellow | Unknown | | Kuenster, Rod | --NR-- |
| 'Calypso' | Small | Blue/Green | White | Hybrid | July into August | Lachman, Wm & Lachman, Eleanor | .1987 |
| 'Cameo' | Miniature | Med-Green | Creamy White | Sport | June into July | Hansen, Hans | .2002 |
| 'Camouflage' | Medium | Med-Green | Green | Sport | July | Chatto, Beth | --NR-- |
| 'Canadian Whirls' | Large | Blue/Green | Yellow | Sport | - | Unknown | --NR-- |
| 'Canby' | Large | Med-Green | Yellow | Unknown | July into August | Tompkins, Chet & Ruh, Peter | .2003 |
| 'Candy Cane' | Small | Blue/Green | Yellow | Unknown | July | Banyai, Pauline & Elslager, Ed | .1995 |
| 'Canterbury Tales' | Medium | Med-Green | White | Sport | July into August | Malloy, Alex | .2002 |
| 'Cape Cod' | Medium | Blue/Green | Yellow | Unknown | - | Goodenough, Rick | --NR-- |
| 'Capitol Hill' | Medium | Dark-Green | Green | Sport | June into July | Avent, Tony | .2005 |
| 'Captain Adventure' | Small | Light-Green | White | Sport | July | Heemskerk, Gerardus | --NR-- |
| 'Captain America' | Large | Dark-Green | Yellow | Hybrid | June into July | Balitewicz, Bob | --NR-- |
| 'Captain's Adventure' | Medium | Light-Green | White | Sport | July into August | Heemskerk, Gerardus | .2009 |
| 'Caravan' | Medium | Med-Green | Yellow | Hybrid | June into July | Ward, Dr Dick & Ward, Jane | .2012 |
| 'Carisa Nichole' | Medium | Blue/Green | Yellow | Hybrid | June into July | Byrd, I. | .2000 |
| 'Carmen Ohio' | Small | Med-Green | White | Hybrid | June into July | Ward, Dr Dick & Ward, Jane | .2015 |
| 'Carnival' | Medium | Med-Green | Yellow | Hybrid | July into August | Lachman, Wm & Lachman, Eleanor | .1986 |
| 'Carol' | Medium | Blue/Green | White | Sport | July into August | Williams, Frances & The American Hosta Society | .1986 |
| 'Carolina Moon' | Medium | Med-Green | Yellow | Sport | July into August | Breiwick, Al | .1997 |
| 'Carolina Sunshine' | Medium | Dark-Green | Yellow | Hybrid | July | Avent, Tony | .1999 |
| 'Carolingian' | Miniature | Med-Green | White | Hybrid | July into August | Malloy, Alex | .2003 |
| 'Carol's August Halo' | Medium | Med-Green | Yellow | Sport | July | Brashear, Carol | --NR-- |
| 'Carousel' | Medium | Med-Green | Yellow | Hybrid | August | Lachman, Wm & Lachman, Eleanor | .1989 |
| 'Carrie Ann' | Small | Blue/Green | White | Unknown | August | Stone, David & Ruh, Peter | .1988 |
| 'Carried Away' | Small | Med-Green | Yellow | Unknown | | Meyer, Bill | --NR-- |
| 'Carry On' | Small | Med-Green | White | Sport | July into August | Mortko, Rob | .2013 |
| 'Cartwheels' | Medium | Blue/Green | Yellow | Sport | July | Summers, Alex & Ruh, Peter | .2002 |
| 'Caryl's Fancy' | Medium | Blue/Green | Light Green | Unknown | - | Vaillancourt, Caryl | --NR-- |
| 'Casablanca' | Large | Dark-Green | White | Unknown | - | Janssen, Bill | --NR-- |
| 'Cascade Mist' | Small | Dark-Green | White | Unknown | - | Walden West Nursery & Walek, Kevin & The American Hosta Society | .2009 |
| 'Cascading Waters' | Large | Med-Green | White | Hybrid | August | Dean, Don | .2005 |
| 'Cathedral' | Medium | Light-Green | White | Sport | July | Malloy, Alex | .2002 |
| 'Cathy's Clown' (Wasitis) | Medium | Med-Green | White | Unknown | June into July | Wasitis, Chick | .2011 |
| 'Cat's Meow' | Medium | Med-Green | Chartreuse | Sport | June into July | Falstad, C.H. | .1998 |
| 'Catskill' | Medium | Dark-Green | Yellow | Hybrid | - | Malloy, Alex | --NR-- |
| 'Cavalcade' | Large | Blue/Green | White | Hybrid | June | Lachman, Wm & Lachman, Eleanor | .1990 |
| 'Cease Fire' | Large | Blue/Green | White | TC Sport | July into August | Schwarz, Jim & Schwarz, Karen & Zilis, Mark | .2014 |
| 'Celadon Treasure' | Giant | Dark-Green | Yellow | Hybrid | June into July | Chrystal, Ian & Colley, June & Baker, John | .2020 |
| 'Celebrity' | Large | Blue/Green | Yellow | Hybrid | June into July | Lachman, Wm & Lachman, Eleanor | .1995 |
| 'Celestial' | Large | Blue/Green | Creamy White | Hybrid | June into July | Elslager, Ed | .2000 |
| 'C'est Magnifique' | Large | Dark-Green | Yellow | Hybrid | July into August | Goodenough, Rick & Gilligan, Madelon | .2017 |
| 'Chado' | Medium | Med-Green | White | Hybrid | July | Johnson, Greg | .2004 |
| 'Chameleon' (Caprice) | Giant | Med-Green | White | Unknown | July into August | Marx, Walter & Caprice Farm Nursery | .1986 |
| 'Champagne' | Small | Blue/Green | Yellow | Hybrid | - | Savory, Robert | .1994 |
| 'Champagne Taste' | Medium | Light-Green | White | Hybrid | June | Schroeder, Bob & Schroeder, Barb & Petryszyn, Olga | .2012 |
| 'Chance Encounter' | Medium | Blue/Green | Green | Nat-Sport | June into July | Hansen, Hans | .2022 |
| 'Change of Heart' | Miniature | Light-Green | White | Hybrid | - | Hansen, Hans | --NR-- |
| 'Change of Tradition' | Medium | Blue/Green | White | TC Sport | August | Zilis, Mark | .1988 |
| 'Changeling' | Large | Med-Green | Yellow | Unknown | July into August | Pollock, Ali | .2005 |
| 'Changing Light' | Large | Med-Green | Yellow | Sport | July into August | Skaggs, Virginia & Skaggs, Brian | --NR-- |
| 'Chantilly Lace' | Medium | Med-Green | White | Hybrid | August | Lachman, Wm & Lachman, Eleanor | .1988 |
| 'Chariot Wheels' | Large | Blue/Green | Yellow | Sport | June into July | Summers, Alex | --NR-- |
| 'Chariots of Fire' | Medium | Light-Green | Yellow | Hybrid | August to October | Dishon, Jim | .2004 |
| 'Charity' | Medium | Dark-Green | White | Sport | June into July | Silvers, Bill | .2011 |
| 'Chat et Souris' | Miniature | Med-Green | Yellow | Unknown | - | Bastille, Jocelyne | --NR-- |
| 'Cheery Charley' | Miniature | Light-Green | White | Sport | August | Green Mountain Hosta | --NR-- |
| 'Cheesecake' | Miniature | Med-Green | White | Sport | August | Aden, Paul & Zilis, Mark | .2010 |
| 'Chelsea Babe' | Miniature | Yellow | Green | Sport | July | Smith, Eric & British Hosta and Hemerocallis Society | .1988 |
| 'Chelsea Ore' | Large | Light-Green | Green | Hybrid | August | Chelsea Physic Garden | .1989 |
| 'Cherries a la Mode' | Small | Yellow | White | Sport | June into July | Vasey, Mike | .2017 |
| 'Cherry Berry' | Medium | Blue/Green | White | Hybrid | July into August | Lachman, Wm & Lachman, Eleanor | .1991 |
| 'Cherub' | Miniature | Med-Green | White | Hybrid | July | Lachman, Wm & Lachman, Eleanor | .1989 |
| 'Chesieres September Frost' | Giant | Blue/Green | White | Sport | July | Hirsbrunner, Liselotte | .2001 |
| 'Chester' | Large | Blue/Green | Yellow | Unknown | - | Westberg, Jim | --NR-- |
| 'Chickadee' | Medium | Med-Green | White | Unknown | August | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Chick's Wannabe' | Small | Light-Green | Yellow | Unknown | - | Wasitis, Chick | --NR-- |
| 'Chiemsee Eisvogel' | Medium | Blue/Green | Green | Sport | July into August | Eschenbach, Volker | --NR-- |
| 'Childhood Sweetheart' | Medium | Light-Green | White | Hybrid | August | Hansen, Hans | .2005 |
| 'Chili Fries' | Small | Dark-Green | Yellow | Sport | August | Solberg, Robert | .2020 |
| 'Chillin' | Small | Blue/Green | White | Unknown | - | Kuenster, Rod | --NR-- |
| 'Chinese Jade' | Medium | Dark-Green | Yellow | Unknown | - | Unknown | --NR-- |
| 'Chinese Sunrise' | Medium | Med-Green | Greenish White | Sport | August to September | Schaeffer, Robert & Ruh, Peter | .1992 |
| 'Chionea' | Small | Med-Green | White | Sport | - | Unknown | --NR-- |
| 'Chippewa' (Arett) | Large | Blue/Green | Yellow | Sport | June into July | Arett, Anne & The American Hosta Society | .1986 |
| 'Chirifu Hime Tokudama' | Medium | Med-Green | White | Sport | July | Unknown | --NR-- |
| 'Chirifu Ogon Himetokudama' | Medium | Med-Green | - | Sport | June into July | Unknown | --NR-- |
| 'Chi-Town Classic' | Small | Med-Green | White | Hybrid | July | Zilis, Mark | .2009 |
| 'Chocolate Soldier' | Small | Med-Green | Yellow | Unknown | - | Hawes, James | --NR-- |
| 'Chris' Small Talk' | Small | Med-Green | Yellow | Nat-Sport | | Brinkmann, Christina | --NR-- |
| 'Chris' Up and Down' | Small | Med-Green | White | Unknown | | Brinkmann, Christina | --NR-- |
| 'Christmas Charm' | Large | Dark-Green | White | TC Sport | July into August | Zilis, Mark | .2003 |
| 'Christmas Cheer' | Large | Dark-Green | White | Hybrid | July | Beilstein, Doug & Beilstein, Mardy | .2018 |
| 'Christmas Lights' | Large | Med-Green | White | Sport | July | Anderson, Jim | --NR-- |
| 'Christmas Pageant' | Large | Dark-Green | White | Sport | July | Pinterics, Michael | .2000 |
| 'Christmas Song' | Medium | Dark-Green | White | Unknown | - | Heemskerk, Gerardus | --NR-- |
| 'Christmas Surprise' | Small | Dark-Green | Yellow | Unknown | - | Unknown | --NR-- |
| 'Christmas Tree' | Large | Dark-Green | White | Hybrid | June into July | Vaughn, Kevin & Seaver, Mildred | .1982 |
| 'Cinderella' | Large | Blue/Green | Yellow | Sport | June into July | Zilis, Mark & Schwarz, Jim | .2004 |
| 'Circle of Light' | Small | Med-Green | White | Hybrid | July into August | Walek, Kevin | .1996 |
| 'Circular Saw' | Medium | Med-Green | Yellow | TC Sport | July into August | Zilis, Mark | .2009 |
| 'Citation' | Medium | Med-Green | Creamy White | Hybrid | July into August | Aden, Paul | .1980 |
| 'City Boy' | Small | Med-Green | White | Unknown | - | Jones, Leonard | --NR-- |
| 'City Dog' | Medium | Med-Green | White | Sport | June into July | Van Eechaute, Danny | .2014 |
| 'City Rat' | Miniature | Med-Green | White | Unknown | | Canning, Rob | --NR-- |
| 'City Slicker' | Medium | Dark-Green | White | Hybrid | August to October | Dishon, Jim | .1996 |
| 'Clarence Nance' | Large | Med-Green | Yellow | Unknown | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Class Act' | Medium | Med-Green | Yellow | Hybrid | - | Zilis, Mark | --NR-- |
| 'Clean Shave' | Medium | Med-Green | White | Sport | July into August | Lysne, Rod | .2019 |
| 'Clearfork Glory' | Large | Light-Green | White | Unknown | - | Ward, Dr Dick & Ward, Jane | --NR-- |
| 'Cleopatra' | Large | Med-Green | Yellow | Unknown | July into August | Harris, Robert | --NR-- |
| 'Clifford's Broken Heart' | Medium | Med-Green | White | Sport | June into July | Clifford, John | .2000 |
| 'Clifford's Forest Fire' | Large | Med-Green | White | Sport | July into August | Clifford, John | .2000 |
| 'Clifford's Polar Moon' | Large | Light-Green | Green | Sport | July into August | Clifford, John | .2000 |
| 'Climax' | Large | Med-Green | Yellow | Sport | June | Jones, Gil | .2000 |
| 'Clokei' | Small | Dark-Green | White | Unknown | - | Viette, Andre & Walek, Kevin | .2009 |
| 'Clown's Collar' | Small | Med-Green | Yellow | Sport | July | Dean, Don | .2004 |
| 'Clyde Crockett' | Medium | Blue/Green | Yellow | Hybrid | August to October | Stygall, Patsy | .2007 |
| 'Coast to Coast' | Giant | Light-Green | Yellow | Hybrid | July | Petryszyn, Olga | .2014 |
| 'Coastal Crinkles' | Small | Light-Green | White | Unknown | | Desmedt, Rik | --NR-- |
| 'Coastal Crinkles' | Small | Light-Green | White | Unknown | | Desmedt, Rik | --NR-- |
| 'Coastal Treasure' | Medium | Med-Green | Yellow | Hybrid | - | Desmedt, Rik | --NR-- |
| 'Cody' | Miniature | Med-Green | White | Hybrid | July | Solberg, Robert | .1996 |
| 'Coldness No.5' | Small | Med-Green | Yellow | Hybrid | August to September | Liu, Zhiyang | .2021 |
| 'Colesburg Wiggles' | Medium | Med-Green | Yellow | Unknown | July into August | Hackbarth, Robert | .2015 |
| 'Collector's Banner' | Medium | Yellow | Green | Sport | July | Janssen, Bill | --NR-- |
| 'Color Festival' | Medium | Yellow | Blue-Green | Sport | July | Van Eechaute, Danny & Heemskerk, Gerardus | .2007 |
| 'Color Guard' | Large | Blue/Green | Yellow | Unknown | - | Unknown | --NR-- |
| 'Color Me Pretty' | Medium | Yellow | Green | Unknown | | Rawson, Don | --NR-- |
| 'Columbus Circle' | Large | Med-Green | Creamy White | Hybrid | July into August | Santa Lucia, Vic & Walek, Kevin | .2009 |
| 'Columbus Treasure' | - | Med-Green | Yellow | Hybrid | - | Unknown | --NR-- |
| 'Commander' | Large | Med-Green | White | Hybrid | June into July | Zilis, Mark | .2010 |
| 'Commander Adama' | Medium | Med-Green | White | Nat-Sport | July into August | Rank, Stefan | --NR-- |
| 'Con Te Partiro' | Small | Blue/Green | White | Hybrid | July into August | Johnson, Greg | .2004 |
| 'Concrete Mixer' | Small | Med-Green | White | Unknown | | Ziarek, Ken | --NR-- |
| 'Connie' | Large | Yellow | Greenish White | Sport | June into July | Benedict, Dr Ralph (Herb) | .1987 |
| 'Connie Sue's Laurel' | Large | Med-Green | Yellow | Unknown | - | Kinchen, Roger | --NR-- |
| 'Constellation Andromeda' | Large | Blue/Green | Yellow | Unknown | - | Wade, Van | --NR-- |
| 'Constitution' | Medium | Dark-Green | White | Hybrid | - | Goodenough, Rick | --NR-- |
| 'Continental' | Medium | Med-Green | White | Sport | July | Malloy, Alex | --NR-- |
| 'Convivial' | Medium | Dark-Green | White | Unknown | - | Livingston, Ron | --NR-- |
| 'Cookie Crumbs' | Miniature | Med-Green | White | TC Sport | July | Zilis, Mark | .2002 |
| 'Cool Hand Luke' | Large | Blue/Green | Yellow | Sport | June into July | Naylor Creek Nursery | --NR-- |
| 'Cool Mistress' | - | Blue/Green | Yellow | Hybrid | - | Philips, Hugo | --NR-- |
| 'Cool Mouse' | Miniature | Blue/Green | Yellow | Nat-Sport | July | Van Eechaute, Danny | --NR-- |
| 'Coquette' | Medium | Med-Green | Creamy White | Hybrid | August | Benedict, Dr Ralph (Herb) | .1987 |
| 'Cordelia' | Medium | Blue/Green | White | Hybrid | July into August | Kuk, Bob | .1991 |
| 'Corona' | Giant | Light-Green | Yellow | Sport | July into August | Braun-Nauerz, Gaby & Warmerdam, Piet | .1996 |
| 'Coronation' | Large | Blue/Green | Yellow | Unknown | June | Goodwin, Randy | .2006 |
| 'Cory's Beauty' | Large | Blue/Green | White | Sport | June | Cory, Robert | .2004 |
| 'Cory's Sweetheart' | Large | Med-Green | Blue-Green | Unknown | - | Cory, Robert | --NR-- |
| 'Cosmic Angel Wings' | Large | Blue/Green | White | Hybrid | August to September | Kuenster, Rod | .2022 |
| 'Cosmic Brother' | Large | Med-Green | Yellow | Hybrid | June into July | Kuenster, Rod | .2006 |
| 'Cosmic Dusk' | Large | Blue/Green | White | Hybrid | - | Kuenster, Rod | --NR-- |
| 'Cosmic Friendship' | Medium | Med-Green | Yellow | Unknown | - | Kuenster, Rod | --NR-- |
| 'Cosmic Goosebumps' | Large | Blue/Green | Yellow | Unknown | | Kuenster,Rod | --NR-- |
| 'Cosmic Joy' | Large | Dark-Green | Yellow | Hybrid | June into July | Kuenster, Rod | .2012 |
| 'Cosmic Lovin' | Large | Med-Green | White | Sport | July into August | Kuenster, Rod | .2013 |
| 'Cosmic Nano' | Small | Blue/Green | Yellow | Unknown | | Kuenster,Rod | --NR-- |
| 'Cosmic Rally' | Large | Med-Green | White | Hybrid | - | Kuenster, Rod | --NR-- |
| 'Cosmic Sky' | Large | Blue/Green | Yellow | Unknown | | Kuenster,Rod | --NR-- |
| 'Cosmic Voyage' | Large | Dark-Green | White | Unknown | - | Kuenster, Rod | --NR-- |
| 'Cosmic Wings' | Medium | Blue/Green | White | Unknown | - | Kuenster, Rod | --NR-- |
| 'Cosmopolitain' | Small | Med-Green | White | Hybrid | - | Bastille, Jocelyne | --NR-- |
| 'Cotillion' | Miniature | Blue/Green | White | Hybrid | June into July | Zumbar, Wm | .1995 |
| 'Cotton Fluff' | Medium | Dark-Green | White | Sport | July into August | Vertz, Mary | .2020 |
| 'Count Your Blessings' | Medium | Med-Green | White | Sport | July | Silvers, Bill | --NR-- |
| 'Counter Point' | Large | Med-Green | White | Sport | July | Aden, Paul | .1982 |
| 'Country Double Take' | Medium | Med-Green | Yellow | Hybrid | August to September | Dean, Don | .2019 |
| 'Country Gentleman' | Large | Blue/Green | Yellow | Unknown | June into July | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'Country Hideaway' | Miniature | Light-Green | Yellow | Unknown | | Spece, Josh | --NR-- |
| 'Country Mouse' | Small | Blue/Green | White | Sport | July | Hansen, Hans | .2007 |
| 'Country River Rapids' | Medium | Blue/Green | Yellow | Hybrid | August to September | Dean, Don | .2020 |
| 'Country Warrior' | Large | Blue/Green | Yellow | Hybrid | July | Dean, Don | .2017 |
| 'Cowabunga' | Large | Light-Green | White | Unknown | - | Asch, Stuart | .2010 |
| 'Cowrie' | Medium | Dark-Green | Yellow | TC Sport | July into August | Walters Gardens | --NR-- |
| 'Cracker Crumbs' | Miniature | Yellow | Green | Sport | July | Solberg, Robert | .2002 |
| 'Cracker Jack' | Small | Med-Green | Yellow | TC Sport | July into August | Zilis, Mark | .2011 |
| 'Crainberry Wine' | Large | Yellow | Yellow | Unknown | - | de Rooij, Piet | --NR-- |
| 'Crater's Heart' | Miniature | Med-Green | Yellow | Unknown | - | Unknown | --NR-- |
| 'Crater's Rim' | Miniature | Med-Green | Yellow | Unknown | - | Unknown | --NR-- |
| 'Crayola Kid' | Medium | Light-Green | White | Sport | July into August | Barta, Jack | --NR-- |
| 'Crazy for You' | Large | Light-Green | Yellow | Unknown | June | Ward, Dr Dick & Ward, Jane | .2009 |
| 'Crazy Hazy' | Medium | Blue/Green | Yellow | Sport | - | Fransen, Marco & Fransen, Joyce | --NR-- |
| 'Crazy Horse' | Small | Yellow | Yellow | Unknown | - | Unknown | --NR-- |
| 'Cream Cheese' | Small | Med-Green | Creamy White | Hybrid | August to October | Lachman, Wm & Lachman, Eleanor | .1991 |
| 'Creature from the Green Lagoon' | Medium | Med-Green | Green | Sport | July | Malloy, Alex | --NR-- |
| 'Crème Brûlée' | Medium | Med-Green | Yellow | Sport | July into August | Johnson, Greg | .2004 |
| 'Creme de Menthe' | Large | Blue/Green | White | TC Sport | June into July | Zilis, Mark | --NR-- |
| 'Crepe Soul' | Small | Med-Green | Yellow | Hybrid | July | Naylor Creek Nursery | --NR-- |
| 'Crepe Suzette' | Miniature | Med-Green | White | Hybrid | July into August | Lachman, Wm & Lachman, Eleanor | .1986 |
| 'Crescent Moon' | Medium | Blue/Green | White | Sport | July into August | Walters Gardens | .1988 |
| 'Crested Surf' | Medium | Med-Green | Creamy White | Hybrid | August | Benedict, Dr Ralph (Herb) | .1990 |
| 'Crickett Bailedout' | Large | Dark-Green | Yellow | Sport | June into July | Bailey, Crickett | .2007 |
| 'Crispula' | Large | Med-Green | White | Unknown | July | Maekawa, Dr Fumio | .2001 |
| 'Crocodile Queen' | Large | Dark-Green | White | Sport | June into July | Schwarz, Jim & Schwarz, Karen | .2014 |
| 'Crocodile Socks' | Medium | Dark-Green | Yellow | Sport | June into July | Van den Top, Jan | --NR-- |
| 'Crossroads Oscar' | Small | Med-Green | White | Hybrid | July | England, Tim | .2003 |
| 'Crossroads Rowdy' | Medium | Med-Green | White | Hybrid | July into August | England, Tim | .2003 |
| 'Crossroads Steve' | Large | Med-Green | Yellow | Hybrid | July | England, Tim | .2003 |
| 'Crown Jewel' | Miniature | Light-Green | Yellow | Sport | June into July | Walters Gardens | .1984 |
| 'Crown Prince' | Small | Yellow | Green | Unknown | August | Ross, Henry & Ruh, Peter | .1987 |
| 'Crown Royalty' | Medium | Blue/Green | Yellow | Hybrid | July into August | Minks, Eldren | .1990 |
| 'Crowned Imperial' | Medium | Blue/Green | White | Sport | July into August | Walters Gardens | .1988 |
| 'Crows Landing' | Medium | Med-Green | White | Hybrid | June into July | Stygall, Patsy | --NR-- |
| 'Crows Landing Lime Sorbet' | Large | Light-Green | White | Unknown | August to September | Stygall, Patsy | .2011 |
| 'Crows Landing Rippled Truffles' | Medium | Med-Green | Yellow | Unknown | August to September | Stygall, Patsy | .2011 |
| 'Crows Landing Standout' | Medium | Blue/Green | White | Unknown | July into August | Stygall, Patsy | .2011 |
| 'Crow's Nest' | Small | Blue/Green | White | Hybrid | August | Seaver, Charles | .1995 |
| 'Crusader' | Medium | Dark-Green | White | Hybrid | August | Lachman, Wm & Lachman, Eleanor | .1989 |
| 'Cry Baby' | Small | Light-Green | Green | Hybrid | July | Jones, Leonard | .1999 |
| 'Crystal Charm' | Small | Med-Green | White | Unknown | July into August | Lachman, Eleanor & Schmid, Tom | .2001 |
| 'Crystal Edge' | Large | Light-Green | White | Unknown | - | Unknown | --NR-- |
| 'Crystal Moon' | Medium | Light-Green | Creamy White | Sport | August | Tower, Alan | .2002 |
| 'Crystal Tiara' | Small | Yellow | Green | Sport | July | Walters Gardens | .1998 |
| 'Cumulonimbus' | Medium | Yellow-Gold | White | Sport | - | Roberts, Mark | --NR-- |
| 'Cupid's Arrow' | Small | Blue/Green | White | TC Sport | July | Walters Gardens | .1988 |
| 'Cupid's Dart' | Medium | Dark-Green | White | Sport | July | Walters Gardens | .1997 |
| 'Curly' | Small | Blue/Green | White | Hybrid | July | Lachman, Wm & Lachman, Eleanor | .1991 |
| 'Curly Locks' | Small | Med-Green | White | Hybrid | July into August | Lachman, Wm & Lachman, Eleanor | .1989 |
| 'Current Sunrise' | Medium | Med-Green | Yellow | Nat-Sport | July | Van den Top, Jan | --NR-- |
| 'Curves' | Medium | Med-Green | Yellow | Hybrid | July into August | Elslager, Ed | .2005 |
| 'Cushing House 1808' | Large | Blue/Green | Yellow | Sport | July into August | Lydell, Ransom | --NR-- |
| 'Cuyahoga' | Medium | Med-Green | Yellow | Hybrid | July into August | Zilis, Mark | .2009 |
| 'Cuyahoga Valley' | Medium | Yellow-Gold | Green | Unknown | | Adams, Dan | --NR-- |
| 'Cyberstar' | Giant | Dark-Green | White | Hybrid | June into July | Elslager, Ed | .2002 |
| 'Cynthia's Early Bird' | Small | Med-Green | White | Unknown | - | Tompkins, Chet | --NR-- |
| 'Cynthia's Extra Special' | Small | Med-Green | - | Unknown | - | Tompkins, Chet | --NR-- |
| 'Czech It Out' | Medium | Blue/Green | White | Sport | June | Van Wyke, Trudy | --NR-- |
| 'Five O'Clock Shadow' | Large | Blue/Green | Creamy White | Sport | June into July | Solberg, Robert | .2000 |
|