- Hampton Court (s) - Mid blue.
- Hannah Beth (s) - Lavender flush. Harrod, 2005.
- Hanna Dale (g) - Maroon grandiflora sweet pea with hooded standard. Dobbie, 1907.
- Hannah Magowan (s) - Scarlet, more fragrant than most scarlet sweet peas. Parsons 2009.
- Hanslope Gem (s) - Salmon pink on cream ground.
- Happy Birthday (s) - An orange red sweet pea of real quality with large flowers. Brewer, 2003.
- Hard Times (s) - Mid blue.
- Harlow Carr (s) - Salmon pink on cream ground, aka Castlewellan. 2005.
- Harmony (e) - A lavender Spencer Paecox sweet pea.
- Harvest Time (s) - Carmine. 1994.
- Harvey's Blush (s) - Salmon pink on cream ground. 1996.
- Hazel Tasker (s) - Rose pink.
- Heartbeat (s) - Cerise. 2001.
- Heart's Delight (s) - Pale pink. 2007.
- Heathcliff (g) - A dark blue modern grandiflora sweet pea.
- Heaven Scent (s) - Cream pink. Harrod, 2007.
- Helen (s) - Rose pink.
- Henry Eckford (g) - Bright orange. Eckford, 1904.
- Henry Thomas (s) - Crimson. Heathcote, 2008.
- Her Majesty (s) - Crimson. 1993.
- Herald (s) - An orange cerise sweet pea popular in the 1960s and 1970s, but now surpassed by modern varieties.
- Hero (s) - A navy blue sweet pea. 2010.
- High Scent (g) - Very fragrant violet picotee on cream. Hammett.
- Hillbury (s) - Crimson.
- Hi-Scent (g) - Alternative spelling of High Scent.
- Holymoorside (s) - Cream. Grayson, 1997.
- Honeymoon (s) - This established lavender flush sweet pea is an excellent exhibition variety. Kershaw, 1972.
- Honeypink (s) - Magenta. Kershaw.
- Hunters Moon (s) - Cream.