A number of sweet pea (Lathyrus odoratus) cultivars have gained the Royal Horticultural Society's Award of Garden Merit. They are annuals grown as twining climbers, with flowers in pastel shades from white through pink to blue and deep purple. There are several bi-colours. Several cultivars are scented to a greater or lesser degree. Sweet peas can be badly affected by aphids, slugs and snails.
List Cultivar Colour Height Fragrance Ref America white/purple medium Aphrodite white strong Ballerina Blue blue (pale) strong Bobby's Girl pale salmon pink medium Bounce Mid Blue lavender Bounce Navy Blue blue (deep) Bramdean white strong Bristol pale violet strong Brook Hall white Cathy white medium Charlie's Angel violet (pale) strong Chris Harrod blue (pale) Crimson Cherub red medium Dorothy Eckford white medium Duo Salmon red/pink strong - Evening Glow pale pink slight First Flame salmon Flora Norton blue medium Gwendoline pale pink medium Hannah's Harmony white/red slight Heathcliff blue (violet) strong High Scent white/violet strong Jacqueline Heather white/pale pink Janet Scott pale pink strong Jilly white medium John Gray white/pale pink medium Just Julia blue (mid) strong King Edward VII crimson medium Lady T. Cherub pink/red medium Lauren Landy cream/pink medium Lavender Sprite pink (lilac) medium Lipstick pink (magenta) strong Madison pink/red strong Margaret Joyce violet strong Martha Mary white medium Mary Mac cream Matucana violet/crimson strong Mrs Bernard Jones pink/white strong Noel Sutton violet blue medium Northern Lights Cherub pink/blue Oklahoma white/crimson strong Pandemonium white/pink Patricia Anne white/violet medium Pocahontas white/pink medium Sicilian Pink cerise/white/purple strong Solway Sapphire blue/white slight Solway Snowflake white/pink Somerset Lady pink (magenta) Starlight magenta medium Sunset white/pink strong Tahiti Sunrise white/coral strong Teresa Maureen white/purple medium Tranquillity red Valerie Harrod white/pink medium Wedding Day white strong White Supreme white strong Wretham Pink pink (pale) strong
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