The following names have already been used within the genus and therefore cannot be re-used. This list is not in strict alphabetical order but is sorted including spaces, full stops etc. in row order. To look at other names click on the appropriate first letter.
| Karlsson Vom Dach | Kathi | Kathy | Katia |
| Katinka | Keira | Ken Underwood | Ken Wilson |
| Kerry Cherry | Kersta | Kessler Früh | Kevernensis |
| Kevernensis Alba | Kicrém | King Edward VII | King George |
| King George V | Kirschrosa | Kiss | Klon Meurs |
| Knap Hill | Knap Hill Pink | Knap Hill Variety | Knaphill Rosea |
| Knaphill Scarlet | Knapp Hill | Knapp Hill Pink | Knapp Hill Variety |
| Knocknowne | Knockomie | Knockowne | Kommer |
| Kopenhagen | Korçula | Kramer's Red | Kramer's Rote |
| Kramer's Rubin | Kramer's Weisse | Kramers Yellow | Kransmaniana |
| Kruessmanniana | Kruse's Mini | Kunst's Rote |
© The Heather Society, 5 September 2007