| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Celtic Dancer' | Medium | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Dean, Don | .2008 |
| 'Charlie' | Medium | Blue/Green | Medial | Green | Nat-Sport | Near-White | July | Graves, Butch | .2008 |
| 'Cherry Tomato' | Miniature | Med-Green | Medial | White | Nat-Sport | Deep-Purple | July | Walters Gardens | .2008 |
| 'Chocolate Ripple' | Large | Dark-Green | Streaked | Yellow | Hybrid | Near-White | July into August | Kuenster, Rod | .2008 |
| 'Civil War' | Large | Blue/Green | - | - | Unknown | Near-White | July | Freeman, Franc & Sally | .2008 |
| 'Colorful Sister' | Large | Blue/Green | Streaked | Yellow | Hybrid | - | July into August | Kuenster, Rod | .2008 |
| 'Continental Divide' | Large | Dark-Green | Medial | Green | Hybrid | Near-White | June into August | Groothuis, Mike & Petryszyn, Olga | .2008 |
| 'Cosmic Baby' | Large | Dark-Green | Streaked | Yellow | Hybrid | - | June into July | Kuenster, Rod | .2008 |
| 'Cosmic Kid' | Large | Dark-Green | Streaked | White | Hybrid | - | June into July | Kuenster, Rod | .2008 |
| 'Cosmic Rainbow' | Medium | Dark-Green | Streaked | Yellow | Hybrid | - | June into July | Kuenster, Rod | .2008 |
| 'Count Your Blessings' | Medium | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | July | Silvers, Bill | .2008 |
| 'Crumb Cake' | Small | Dark-Green | - | - | Hybrid | Light-Purple | July | Solberg, Robert | .2008 |
| 'Curly Fries' | Medium | Light-Green | - | - | Unknown | Deep-Purple | August | Solberg, Robert | .2008 |
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