350 Symphyotrichum puniceum Seeds - Purple-Stemmed Aster Native Wildflower for Pollinator Gardens

Symphyotrichum puniceum, commonly known as purple-stemmed aster or swamp aster, is a robust native perennial wildflower that brings late-season color to pollinator gardens and naturalized landscapes. Its sturdy, often reddish-purple stems rise above lance-shaped green foliage, topped in late summer and fall with loose clusters of pale violet to lavender-blue daisy-like flowers. These blooms are highly attractive to bees, butterflies, and other beneficial insects when many other plants have finished flowering.

Purple-stemmed aster is an excellent choice for rain gardens, meadow plantings, pollinator borders, and native plant restorations. It thrives in moist to wet soils and can tolerate seasonal flooding, making it a valuable addition to challenging sites. Its tall, upright habit provides structure and late-season interest, while its seeds offer a rewarding project for gardeners looking to establish native wildflowers from scratch.

Plant Features

• Native perennial wildflower with late-season blooms
• Attracts bees, butterflies, and other pollinators
• Distinctive purple-tinged stems and lance-shaped foliage
• Tolerates moist to wet soils and seasonal flooding
• Ideal for pollinator gardens, rain gardens, and naturalized areas

Growing Information

• Botanical Name: Symphyotrichum puniceum
• Plant Type: Herbaceous perennial
• Sunlight: Full sun to partial shade
• Soil: Moist to wet, well-drained to poorly drained
• Water Requirements: Medium to high; consistent moisture preferred
• Growth Habit: Upright, clump-forming
• Bloom Season: Late summer to fall
• Mature Height: 3 to 6 feet
• Spacing: 18 to 24 inches apart

Planting & Care

Sow purple-stemmed aster seeds indoors in late winter or directly in the garden in early spring. Lightly press seeds into the soil surface, as they require light to germinate. Keep the soil consistently moist but not waterlogged. Germination typically occurs in 2 to 4 weeks at temperatures around 65-70°F. Once seedlings have several sets of true leaves, transplant them outdoors after the last frost, spacing them 18 to 24 inches apart.

Choose a site with full sun to partial shade and moist, rich soil. Water regularly during the first growing season to help plants establish. Once established, purple-stemmed aster is relatively low-maintenance but benefits from consistent moisture, especially during dry periods. Divide clumps every few years to maintain vigor. Deadhead spent flowers to encourage additional blooms or allow seed heads to mature for self-sowing and winter interest.

What's Included

350 Symphyotrichum puniceum seeds.