Heirloom Variety
Cupani's Original Sweet Pea is one of the oldest cultivated heirloom sweet pea varieties, renowned for its intoxicating fragrance and deep maroon-and-violet bicolored blooms. This vigorous climbing annual grows 6 feet tall on sturdy vines and reaches full flower production in about 84 days from seed. Hardy from zones 2 to 11, it thrives in full sun with moderate water and rich soil, producing continuous blooms from spring through summer when deadheaded regularly. What sets it apart is its legendary heat tolerance, a reputation earned through centuries of cultivation that makes it surprisingly reliable even in challenging Northeast gardens.
Full Sun
Moderate
2-11
72in H x 8in W
Annual
High
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Deep maroon and violet bicolored flowers fill the air with a scent so intoxicating that once you've grown Cupani's Original, other sweet peas feel pale by comparison. This ancient heirloom has thrived in gardens for generations precisely because it performs: it tolerates heat better than modern varieties, flowers reliably even when spring arrives late, and rewards deadheading with weeks of continuous bloom. Tall, vigorous vines climb to 6 feet and attract bees and butterflies while shrugging off deer browsing. Plant it early in spring and let it scramble up a sturdy trellis for fragrant cut flowers all season long.
Cupani's Original Sweet Pea is grown primarily as a cut flower, with its intensely fragrant blooms ideal for arrangements, nosegays, and bringing indoors to perfume rooms. The flowers are edible and can garnish salads or desserts. It's also valued as an ornamental climber for trellises, arbors, and fences where its vigorous vines and continuous blooming create both visual interest and fragrance throughout the season.
Sow seeds in deep pots 4 to 6 weeks before your last spring frost, keeping the soil at 55 to 65°F. Once seedlings emerge, move them to cool outdoor conditions before their first leaves unfurl to harden them off gradually.
Transplant hardened seedlings outdoors 3 to 4 weeks before your last spring frost, as soon as soil can be worked. Handle carefully and space 6 inches apart in rows 36 inches apart.
Sow seeds directly outdoors as early as possible in spring, 3 to 4 weeks before your last frost. Prepare soil with 3 to 4 inches or more of compost and aged manure worked deeply into the bed.
Cut flowers for arrangements as soon as blooms open fully, preferably in the early morning when stems are most turgid. Pick flowers frequently and remove any faded blossoms that remain on the plant to sustain blooming. For edible flowers, harvest fresh blooms at peak color and fragrance.
Deadhead spent flowers regularly throughout the growing season to encourage continuous blooming. This aggressive deadheading is key to extending the flowering period from spring through summer.
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“Cupani's Original Sweet Pea carries the name of Father Francisco Cupani, a Sicilian monk and botanist who is credited with cultivating and potentially naming this variety centuries ago. It stands as one of the oldest sweet pea cultivars in continuous cultivation, having been preserved and passed through gardens from the Mediterranean to Northern Europe and eventually across the Atlantic to North American gardeners. The variety's survival through time speaks to its reliability and the devotion of seed savers who recognized its exceptional fragrance and heat tolerance as worth protecting. Unlike modern hybrid sweet peas bred for appearance alone, Cupani's Original represents a direct link to the origins of sweet pea breeding itself.”