Lathyrus odoratus, commonly known as sweet pea, is a fragrant annual climbing flower native to the Mediterranean region. These charming flowers are prized for their exceptional honey-like fragrance and vibrant colors (white, pink, purple, blue, and bicolor). Sweet peas are easy to grow from seed and perform best in cool weather conditions, germinating reliably within 7-21 days when provided with proper scarification and cool soil temperatures.
Before sowing
For white, brown, and wrinkle-seeded varieties, scarification is not needed. Nick the seed coat only for mottled and black-seeded varieties.
Sowing
What to expect
Tips
Nick the seed coat with a nail file or clippers before sowing, especially for mottled and dark-seeded varieties. Do not soak seeds overnight. Sow 1/4 to 1/2 inch deep in darkness (darkness is required for germination). Keep soil temperature between 55-65°F for optimal germination. Ensure soil remains moist but not waterlogged. Plant outdoors in cool weather—early fall for autumn bloom or early spring for spring/summer bloom. Pinch seedlings at 6 inches tall to encourage bushy branching. Provide sturdy support structures (trellis, netting, or twine) for climbing varieties. Mulch around plants to keep roots cool and retain moisture. Cut flowers frequently to encourage continuous blooming.
Sources: Almanac.com, Johnny's Selected Seeds, New York Botanical Garden, White Flower Farm, Fontana Seeds, Missouri Botanical Garden, Gardener's Path
