Lathyrus odoratus. Long vines grow 2-3m (6-10') tall with sturdy stems making excellent cut flowers. Early Multiflora sweet pea seeds can be planted in early spring. Planted in the fall, it may bloom well into winter in mild or protected winter areas. This variety is an excellent candidate for forcing in the greenhouse. The abundant flowers appear in solid colours with good fragrance, and they look smashing in a bouquet. Be sure to pick off the spent flowers before they turn into seed pods in order to keep the vines flowering over a longer period. Sweet pea seeds may germinate more quickly if they are soaked in luke warm water for six hours prior to planting.
Sweet peas (Lathyrus odoratus) are annual climbing plants which can grow to heights of 1–2 meters (3-6'). Most varieties require a trellis for support. The flowers range with a variety of colours and intensity of fragrance. They are are a flowering plant in the genus Lathyrus in the family Fabaceae (legumes), native to Sicily, southern Italy and the Aegean Islands. Continue reading below for some tips on how to grow sweet peas from seed.
Lathyrus odoratus and others
Season & Zone
Exposure: Full sun
Sow indoors 6-8 weeks before the last average frost date for your area. Or direct sow outdoors in early spring, while the soil is still cool and light frost is still possible. Plants are strongest from an early, indoor sowing. Sweet peas can also be direct sown in the fall where winters are mild.
Sow seeds 1cm (½”) deep. If starting indoors, chip seeds or soak them in warm water for 24 hours. Use a seed inoculant for the best results. Maintain a soil temperature of 12-18°C (55-65°F). Seeds should germinate in 10-20 days.
For best results, prepare the sweet pea bed the previous fall. Cultivate the soil to 45cm (18″) deep, incorporating a generous amount of finished compost. Also dig in bone meal. At transplant time, dig ¼ cup balanced organic fertilizer into the soil beneath each plant. Space vines at 15cm (6″) and provide trellis support. Mulch around plants to keep the soil as cool as possible, and water during dry weather. Keep plants picked to prolong the blooming period.