- Karen Harrod (s) - Mid blue. Harrod, 2011.
- Karen Louise (s) - Lavender. Beane, 1998.
- Karen Reeve (s) - Maroon. Reeve, 1980.
- Karen Tremewan (s) - Orange-pink. Tremewan, 1984.
- Kathleen (e,m) - Rich orange Cuthbertson Florabunda. Cuthbertson.
- Katie (e,m) - Rose, cream ground Cuthbertson Florabunda. Cuthbertson.
- Katie Alice (s) - Mauve. 2006.
- Kelvedon Beauty (s) - Mauve. Beane, 2005.
- Ken Colledge (s) - Mauve. Colledge, 1992.
- Kenneth (e,m) - Crimson Cuthbertson Florabunda. Cuthbertson.
- Kernow (s) - Scarlet. Tremewan, 1986.
- Kiera Madeline (s) - Cream picotee. Heathcote, 2009.
- King Edward VII (g) - Crimson. Eckford, 1903.
- King Manoel (s) - Chocolate maroon. Stark, 1915.
- King of the Mauves (s) - Mauve. Woodcock, pre 1942.
- King Size (m) - A sries of ten multiflora varieties.
- Kingfisher (g) - Violet flush, cream ground. Taylor.
- King's Bounty (s)- Magenta. 1984.
- King's Bride (s) - Rose pink, cream ground. 1992.
- King's Cloak (s) - Dark blue. 1992
- King's Frill (s) - Picotee.
- King's Reach (s) - Mid blue. 1993.
- Kippen Cream (s) - Cream. Chisholm, 1998.
- Kiri Te Kanawa (s) - Rose pink. 1995.
- Kitty Hawk (s) - Cerise. 2003.
- Kyle the Clown (s) - Cerise stripe. Chisholm, 2001.