| No. | Cultivar Name | Source | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Registered |
|
1
| 'Kassel' | Klose, Heinz | - | Med-Green | Medial | White | Unknown | - | - | --NR-- |
|
2
| 'Kasseler Blue' | Klose, Heinz & Ruh, Peter & Ruh, Jean | Medium | Blue/Green | - | - | Unknown | - | - | .2008 |
|
3
| 'Kasseler Gold' | Klose, Heinz & Ruh, Peter & Ruh, Jean | Medium | Yellow | - | - | Hybrid | Pale-Lavender | June into July | .2003 |
|
4
| 'Kerry' | Unknown | | | | | Unknown | | | --NR-- |
|
5
| 'Klaus von Klitzing' | Braun-Nauerz, Gaby | Large | Dark-Green | Medial | Light Green | Unknown | Pale-Lavender | June | .2003 |
|
6
| 'Kleiner Schelm' | Kohlein, Fritz | Miniature | Light-Green | - | - | Unknown | Med-Lavender | - | --NR-- |
|
7
| 'Konkubine' | Klose, Heinz & Ruh, Peter & Ruh, Jean | Medium | Yellow | - | - | Unknown | Pale-Lavender | July | .2005 |
|
8
| 'Konkubine Ersten Ranges' | Beuchert, Marianne & Simon, Hans & Werner, Klaus | Large | - | - | - | Unknown | - | - | --NR-- |
|