- Aerospace (s) - White.
- Aileen Walton (s) - Mauve. 2005.
- Air Force (s) - Misty mid Blue. Grayson, 1997.
- Air Warden (s) - This scarlet was a top exhibition sweet pea in the 1950s.
- Airan (s) - A nicely scented white heavily flushed with violet blue. Kerton, 2002.
- Alan Titchmarsh (s) - A deep pink sweet pea with a good scent.
- Alan Williams (s) - Mid blue.
- Alaska Blue (s) - Blue flush. Wells, 2000.
- Alastair (s) - Crimson.
- Albutt Blue (g) - Highly scented blue picotee sweet pea, intermediate Spencer/grandiflora type. Albutt, 1999.
- Alice Hardwicke (s) - An orange-red sweet pea, from the 1970s.
- Alison (s) - Picotee on cream ground.
- Almost Black (g) - Intensely dark old fashioned sweet pea. Hammett.
- America (g) - A handsome red flake grandiflora sweet pea. Morse, 1896.
- American Beauty (e) - A carmine Spencer Praecox variety.
- Amethyst (e) - A royal purple Spencer Praecox sweet pea.
- Amy (s) - Maroon. 2002
- Andrea Robertson (s) - Blue bicolour. 2002
- Andrew Cavendish (s) - Light lavender. 2007.
- Andrew Unwin (s) - Lavender.
- Angela Ann (s) - An attractive rose pink on a white background. Harvey Albutt.
- Ann (e) - A carmine rose Cuthbertson Florabunda sweet pea. Cuthbertson.
- Annabelle (s) - Lavender.
- Anne Barron (s) - Rose pink on a cream ground. 1999
- Anne Greg (s) - Cream. 1994.
- Anne Hathaway (g) - Old fashioned pale blue stripe on white. Grayson, 2003.
- Anne Vestey (s) - Scarlet.
- Annie Conole (s) - Pale blue. 2006.
- Annie B Gilroy (g) - Bright cerise. Eckford, 1907.
- Annie Good (s) - Magenta with a nice scent, but growth inclined to be rather weak.
- Annie Laurie (e) - A deep rose Spencer Praecox sweet pea.
- Anniversary (s) - The finest exhibition pink picotee sweet pea. Truslove, 1986.
- Anthea Turner (s) - Salmon pink on cream ground. 1995.
- Appeal (s) - Cerise. 1999
- Apple Blossom (s) - Pale pink flush. 2001.
- Apricot Queen (s) - Orange-pink
- Apricot Sprite (s) - Orange-pink.
- April in Paris (s) - Pale primrose with a lilac flush and rich fragrance. Hammett.
- April Louise (s) - Red. Kerton, 2005
- Aquarius (s) - Blue stripe. Place, 2001.
- Arbor Low (s) - Orange-red.
- Arthur Hellyer (s) - Lavender flush. 1994.
- Ascot (s) - Salmon pink on a cream ground. 1981.
- Astrid (e) - A lavender Cuthbertson Florabunda sweet pea. Cuthbertson.
- Aunt Jane (s) - Pale magenta. Matthewman, 2000.
- Aunt Molly (s) - Carmine flush on white. 2002.