50 Lathyrus niger Perennial Sweet Pea Seeds - Purple Climbing Vine for Trellis

Lathyrus niger, commonly known as perennial sweet pea, is a charming climbing vine that brings a touch of wild elegance to any garden. Unlike annual sweet peas, this perennial species returns year after year, producing delicate purple flowers that attract pollinators and add vertical interest to trellises, fences, and arbors. Its slender stems and pinnate leaves create a soft, airy texture, making it an excellent choice for cottage gardens, meadow plantings, or naturalized areas.

This hardy perennial is well-suited for gardeners looking to add a long-lasting climber with minimal fuss. The flowers, though smaller than those of annual sweet peas, are rich in nectar and bloom through the summer months, providing a reliable source of color and fragrance. Whether you're training it up a support or letting it scramble through shrubs, Lathyrus niger offers a graceful, old-fashioned charm that enhances any landscape.

Plant Features

• Perennial climbing vine with purple flowers
• Attracts pollinators such as bees and butterflies
• Ideal for trellises, fences, and arbors
• Returns year after year in suitable climates
• Low-maintenance and adaptable to various soils

Growing Information

• Botanical Name: Lathyrus niger
• Plant Type: Perennial
• Sunlight: Full sun to partial shade
• Soil: Well-drained, moderately fertile soil
• Water Requirements: Moderate; keep soil evenly moist
• Growth Habit: Climbing vine
• USDA Hardiness Zones: 5-9
• Bloom Season: Summer
• Mature Height: 3-6 feet
• Spacing: 12-18 inches apart

Planting & Care

Sow Lathyrus niger seeds indoors 6-8 weeks before the last frost or directly outdoors in fall for natural stratification. Scarify seeds by nicking the hard coat and soak in water for 24 hours before planting to improve germination. Sow seeds 1/4 inch deep in a well-draining seed-starting mix, keeping them at 65-70°F (18-21°C). Germination can be slow and uneven, taking 14-30 days. Once seedlings have several true leaves, harden them off and transplant to the garden after the danger of frost has passed.

Provide a trellis or support for the vines to climb. Water regularly during the growing season, especially during dry spells, but avoid waterlogging. Mulch around the base to conserve moisture and suppress weeds. In late winter or early spring, prune back old growth to encourage new shoots. Perennial sweet peas generally require little fertilization; a light application of compost in spring is sufficient. Monitor for pests and diseases as needed, and enjoy the return of these lovely purple blooms each year.

What's Included

50 Lathyrus niger perennial sweet pea seeds.