Rosay Sweet Pea is a tall, elegant climbing flower that reaches 6 feet and blooms reliably from spring through summer over 84 days from seed to flower. This cultivar of the classic Lathyrus odoratus brings fragrance and color to trellises and arbors in full sun gardens, attracting pollinators while standing firm against deer browse. Plant it in early spring for a cascade of blooms that lasts through the warm months.
6
Full Sun
Moderate
2-11
72in H x 8in W
—
High
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Reaching a full 6 feet tall on slender stems, Rosay Sweet Pea commands vertical space with grace and fragrance. It blooms prolifically from March through August, rewarding regular tending with weeks of continuous flowers. Deer leave it untouched, and bees and butterflies flock to its nectar, making it both a practical and pollinator-friendly choice for cottage gardens and cut-flower displays.
Rosay Sweet Pea excels as a cut flower for arrangements and bouquets, with stems that reach 6 feet and a long vase life when harvested regularly. It's grown on trellises and arbors to create vertical garden walls of color and fragrance throughout the spring and summer months. Gardeners also plant it for its strong pollinator appeal, making it valuable in gardens designed to support bees and butterflies.
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Sow seeds in deep pots 4 to 6 weeks before your last spring frost, planting at a depth of 1/2 to 1 inch. Keep soil at 55 to 65°F until germination, which typically occurs within 5 to 30 days. Once seedlings emerge and before leaves unfurl, transfer pots to cold conditions outside to harden them off before transplanting.
Transplant seedlings outdoors after hardening off, timing the move for 3 to 4 weeks before your last spring frost. Space plants 6 inches apart in soil enriched with compost and aged manure.
Direct sow seeds outdoors 3 to 4 weeks before your last spring frost at a depth of 1/2 to 1 inch.
Harvest flower stems regularly when buds are just opening or flowers are fully open, cutting them in the early morning for maximum vase life. Pinching off spent flowers encourages continued blooming throughout the season. Cut stems reach up to 6 feet, making them excellent for bouquets and arrangements.
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