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

Lathyrus polyphyllus, commonly known as perennial sweet pea, is a charming climbing vine that brings a touch of wild beauty to any garden. Unlike annual sweet peas, this species returns year after year, producing clusters of purple, pea-like flowers that attract pollinators and add vertical interest to trellises, fences, and arbors. Its delicate foliage and twining habit make it an excellent choice for cottage gardens, meadow plantings, or naturalized areas.

This perennial sweet pea is native to the western United States and is well-suited to a range of garden settings. It thrives in full sun to partial shade and prefers well-drained soil. The vines can grow vigorously, reaching heights of 3 to 6 feet or more, and are best supported by a trellis or other structure. The purple blooms appear in late spring to summer, providing a long season of color and fragrance.

Plant Features

• Perennial climbing vine with purple, pea-like flowers
• Attracts pollinators such as bees and butterflies
• Twining growth habit ideal for trellises and fences
• Returns year after year in suitable climates
• Native to western North America

Growing Information

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

Planting & Care

Sow seeds indoors 6-8 weeks before the last frost or directly outdoors in fall or early spring. Soak seeds in water for 24 hours before planting to improve germination. Plant seeds about 1/4 inch deep in a well-draining seed-starting mix. Keep the soil consistently moist but not waterlogged. Germination can take 14-30 days at temperatures around 65-70°F (18-21°C). Once seedlings have developed 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 dry periods, and mulch to retain moisture and suppress weeds. Perennial sweet peas benefit from a layer of mulch in winter in colder zones. Prune lightly after flowering to encourage bushier growth and remove spent blooms to prolong the flowering season. Avoid over-fertilizing, as too much nitrogen can promote foliage at the expense of flowers.

What's Included

50 Lathyrus polyphyllus perennial sweet pea seeds.