- Ballerina (s) - Picotee on cream.
- Balmoral (s) - Maroon. 1994.
- Band Aid (s) - Salmon pink on cream ground.
- Banty (s) - Rose pink. Leese, 2008.
- Baronscourt (s) - A nicely scented mauve sweet pea. Harrod, 1999.
- Barry Dare (s) - Cerise. 1997
- Batheaston (s) - Pale pink.
- Beaujolais (s) - Maroon. Sutton, 1972.
- Benjamin Townsend (g) - White. Grayson, 1997.
- Bert Boucher (s) - White. Brewer, 1995.
- Beth Chatto (s) - A pale pink sweet pea on a cream ground. 2010.
- Betty Maiden (s) - Blue flake. 2008.
- Big Blue (s) - Mid blue. Hammett, 2009.
- Bill's Choice (s) - Rose pink. 2008.
- Bishop's Rock (s) - Mid blue. 1998
- Black Diamond (s) - Maroon. 1975.
- Black Knight (g) - Deep maroon. Eckford, 1898.
- Black Prince (e) - A Spencer Praecox variety.
- Black Prince (s) - Maroon. 1975.
- Blackberry (g) - Maroon old fashioned sweet pea. 2009.
- Blackberry Ice (s) - Bicolour.
- Blackcurrant Mousse (s) - Mauve. 1999
- Blanche Ferry (g) - Pink/white bicolour. Ferry 1889.
- Blaze (s) - Scarlet. 1974.
- Blondel (s) - Cream.
- Blondie (s) - A long stemmed pale salmon sweet pea. Harrod.
- Blue Beguine (s) - Mid blue. Harrod.
- Blue Celeste (s) - Pale blue.
- Blue Danube (s) - Mid blue. 1981.
- Blue Heaven (s) - Pale blue. 1974.
- Blue Ice (s) - Pale blue. 1994.
- Blue Mantle (s) - Mid blue.
- Blue Ripple (s) - Blue stripe.
- Blue Shift - Flowers open mauve, changing to turquoise and ultramarine as they age. Hammett.
- Blue Triumph (s) - Mid blue.
- Blue Vein - Orange flowers developing blue veins and fading as flowers mature. Hammett.
- Blue Velvet (s) - Dark blue. Unwin, 1972.
- Blue Wonder (e) - A Spencer Praecox sweet pea.
- Blushing Bride (s) - Rose pink on cream ground.
- Bobby Bolton (s)- Cerise.
- Bobby's Girl (s) - Salmon pink on cream ground. Bolton, 2000.
- Borderline - Magenta stripe.
- Bowhouse (s) - Mauve. Chisholm, 1996.
- Bramdean (g) - White. Wakefield, 2007.
- Brenda - Rich pink bicolour sweet pea from New Zealand.
- Brian Clough (s) - An orange pink sweet pea which was popular in the 1990s.
- Brian Haynes - Lavender flake.
- Bridget (s) - Light maroon. 1996.
- Bridget Elizabeth (s) - Rose pink on white ground. 2002.
- Brightness (e) - A Spencer Praecox sweet pea.
- Brilliant Blue (g) - Purplish blue. The American release of Lord Nelson. 1907.
- Bristol (s) - An excellent light blue sweet pea. Kerton, 1993.
- Bristol Cream (s) - Cream.
- Brook Hall (s) - White. Harrod, 2006.
- Brush Strokes - Orange flake on cream ground.
- Buccaneer (s) - Crimson.
- Burnished Bronze (s) - A bright reddish maroon sweet pea. Harrod, 1991.
- Butterfly (g) - White shaded with mauve. Sutton, 1878.