Royal Blue Sweet Pea Seeds – Lathyrus odoratus Climbing Vine (50 Seeds)

Royal Blue Sweet Pea (Lathyrus odoratus) is a classic climbing annual prized for its richly colored, fragrant blooms and vigorous vining habit. The deep royal blue flowers add a striking vertical accent to gardens, fences, trellises, and arbors, and they make excellent cut flowers for bouquets. Sweet peas are easy to grow from seed and reward gardeners with a long season of bloom when given proper support and cool growing conditions.

This packet contains 50 seeds of this beloved heirloom-style variety, ideal for planting along fences, obelisks, or any sturdy support where the climbing vines can reach their full potential. The plants typically grow 6 to 8 feet tall and produce multiple stems of lightly scented flowers that attract pollinators and brighten any landscape.

Plant Features

• Fragrant royal blue flowers on long stems
• Vigorous climbing vine habit, reaching 6–8 feet
• Excellent for cut flower arrangements
• Attracts bees and other pollinators
• Easy to grow from seed; suitable for annual borders and containers

Growing Information

• Botanical Name: Lathyrus odoratus
• Plant Type: Annual climbing vine
• Sunlight: Full sun to partial shade
• Soil: Well-drained, fertile soil
• Water Requirements: Moderate; keep soil evenly moist
• Growth Habit: Climbing; requires support
• USDA Hardiness Zones: 2–11 (grown as an annual)
• Bloom Season: Late spring to summer
• Mature Height: 6–8 feet
• Germination Requirements: Scarify seeds and soak before sowing; germinate at 55–65°F
• Spacing: 6–12 inches apart

Planting & Care

For best results, nick or file the seed coat and soak seeds in water for 12–24 hours before sowing. Plant seeds outdoors after the last frost date, or start indoors 4–6 weeks earlier in deep pots to minimize root disturbance. Sow seeds about 1 inch deep and keep the soil consistently moist until germination, which typically occurs in 10–21 days at 55–65°F. Provide a trellis or other support at planting time so the vines can climb as they grow.

Water regularly during dry spells and mulch to keep roots cool. Fertilize lightly if soil is poor, but avoid excessive nitrogen, which promotes foliage over flowers. Deadhead spent blooms to encourage continued flowering. Sweet peas prefer cool weather and may decline in intense summer heat; in hot climates, provide afternoon shade. Monitor for aphids and other common pests, and ensure good air circulation to prevent fungal issues.

What's Included

50 Royal Blue Sweet Pea seeds (Lathyrus odoratus) for garden planting.