| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Carolina Blue' | Medium | Blue/Green | | - | Hybrid | Light-Purple | August | Solberg, Robert | .2000 |
|
2
| 'Carpathian Green Fields' | Giant | Blue/Green | | | Unknown | Near-White | July into August | Zglenicka, Beata | .2022 |
|
3
| 'Cat's Claw' | Large | Blue/Green | | | Unknown | Unknown | Unknown | Ziarek, Ken | --NR-- |
|
4
| 'Chiemsee Angel' | Giant | Blue/Green | Streaked | Yellow | Sport | Near-White | June into July | Eschenbach, Volker | --NR-- |
|
5
| 'Chiemsee Surprise' | Large | Blue/Green | Streaked | White | Sport | Pale-Lavender | July into August | Eschenbach, Volker | --NR-- |
|
6
| 'Chivalry' | Medium | Blue/Green | | - | Hybrid | Med-Lavender | July into August | Malloy, Alex | .2001 |
|
7
| 'Chodai Ginyo' | Large | Blue/Green | | - | Sport | Med-Lavender | July into August | Unknown | --NR-- |
|
8
| 'Clambake' | Large | Blue/Green | | - | Hybrid | Pale-Lavender | July into August | Goodwin, Randy | .2000 |
|
9
| 'Clear Fork River Valley' | Large | Dark-Green | | - | Hybrid | Near-White | June into July | Wade, Van | .2007 |
|
10
| 'Coal Miner' | Small | Dark-Green | | - | Hybrid | Unknown | June into July | Petryszyn, Olga | .2010 |
|
11
| 'Cool Dreams' | Medium | Blue/Green | | - | Hybrid | Pale-Lavender | June into July | Zilis, Mark | .2010 |
|
12
| 'Cool Hand Luke' | Large | Blue/Green | Marginal | Yellow | Sport | Near-White | June into July | Naylor Creek Nursery | --NR-- |
|
13
| 'Cool Waters' | Medium | Blue/Green | | - | Hybrid | Light-Purple | June into July | Zilis, Mark | .2010 |
|
14
| 'Cosmic Blue Seas' | Medium | Blue/Green | | | Hybrid | Pale-Lavender | June into July | Kuenster,Rod | .2021 |
|
15
| 'Cosmic Crocodile' | Large | Blue/Green | | | Hybrid | Pure-White | June into July | Kuenster,Rod | .2021 |
|
16
| 'Country Rippled Relic' | Medium | Blue/Green | | - | Hybrid | Med-Lavender | July into August | Dean, Don | .2019 |
|