- Nacre (s) - Pale pink on cream. Grayson, 1998.
- Nancy (e) - A light salmon on cream Cuthbertson Florabunda sweet pea. Cuthbertson.
- Nancy Chisholm (s) - Rose pink. Chisholm, 1994.
- Nancy Colledge (s) - Orange-red.
- Nanette Newman (s) - Carmine-magenta. Brackley, 1992.
- Nanna K (s) - Blue flake sweet pea. Rowland, 2004.
- Naomi Nazareth (s) - Pale blue. Parsons, 2009.
- Nelly Viner - Pink. Possibly an early Spencer sweet pea, but often listed as a grandiflora. Viner, 1901.
- Nimbus (s) - Dark purple-blue stripe. 1996.
- Noel Edmonds (s) - Orange-pink.
- Noel Sutton (s) - A famous old mid blue sweet pea with a rather heavy fragrance. 1968.
- Nora Holman (s) - Salmon pink on a cream ground. A good exhibition sweet pea. Tremewan.
- Norman Wisdom (s) - White. Unwin, 2003.
- North Shore (s) - A fine bicolour blue sweet pea. Some stocks are mixed, but well worth growing. Hammett.