Mammoth Navy Sweet Pea Seeds – Lathyrus odoratus Tall Climbing Flower Vine (50 Seeds)

Mammoth Navy Sweet Pea is a tall climbing annual vine prized for its large, richly colored navy-blue flowers and sweet fragrance. This heirloom-style variety produces long stems that are ideal for cutting, making it a favorite for bouquets, garden trellises, and vertical color. The vines climb vigorously and bloom over a long season when given cool conditions and regular care.

Sweet peas are classic cottage-garden plants that add height, fragrance, and charm to fences, arbors, and obelisks. Mammoth Navy is especially valued for its deep, saturated color and generous flower production.

Plant Features

• Tall climbing vine habit, excellent for trellises and vertical interest
• Large, fragrant navy-blue flowers
• Long stems suitable for cut flower arrangements
• Prolific bloomer when grown in cool weather
• Annual vine that can be grown in containers with support

Growing Information

• Botanical Name: Lathyrus odoratus
• Plant Type: Annual climbing vine
• Sunlight: Full sun to partial shade
• Soil: Rich, well-drained soil
• Water Requirements: Moderate; keep soil evenly moist
• Growth Habit: Climbing vine; requires support
• Bloom Season: Late spring to summer in cool climates
• Mature Height: 6–8 feet when supported
• Spacing: 6–12 inches apart

Planting & Care

For best results, sow sweet pea seeds directly outdoors in early spring, as soon as the soil can be worked, or start seeds indoors 4–6 weeks before the last frost. Nick or soak seeds for 24 hours before planting to improve germination. Plant seeds about 1 inch deep and keep the soil consistently moist until seedlings emerge. Provide a trellis or other support at planting time, as vines climb quickly.

Sweet peas prefer cool growing conditions and benefit from regular watering and a layer of mulch to keep roots cool. Fertilize lightly; too much nitrogen can reduce flowering. Deadhead spent blooms to encourage continued flowering. In hot climates, provide afternoon shade to extend the bloom season.

What's Included

50 Mammoth Navy Sweet Pea seeds (Lathyrus odoratus).