Purple Ironweed (Vernonia fasciculata) Flower Seeds

Bring bold color and height to your native garden with Purple Ironweed (Vernonia fasciculata) Seeds, a hardy prairie perennial celebrated for its rich purple flower clusters and strong upright stems. This native wildflower thrives in full sun and moist to medium soils, making it an excellent choice for pollinator gardens, meadow plantings, wetland edges, and naturalized landscapes.

Purple Ironweed’s dense flower clusters bloom late in the season, providing vibrant late-summer color and steady support for bees and butterflies. These Non-GMO Purple Ironweed Seeds grow into long-lived, resilient plants that add structure and beauty to any wildlife-friendly garden.

Features

• Produces vivid purple flower clusters
• Tall, upright perennial ideal for naturalized areas
• Supports bees, butterflies, and other pollinators
• Thrives in full sun and moist soils
• Non-GMO seed quality
• Excellent for native prairie and meadow gardens
• Late-season blooms add extended color
• Tolerates variable soil conditions, including clay

Specifications

• Botanical Name: Vernonia fasciculata
• Common Name: Purple Ironweed
• Seed Type: Non-GMO
• Plant Type: Perennial wildflower
• USDA Zones: 3–9
• Sun Exposure: Full sun
• Soil Type: Moist to medium soils; tolerates clay and loam
• Water Needs: Moderate; prefers consistent moisture
• Flower Color: Purple
• Bloom Time: Late summer to early fall
• Height: 48–72 inches
• Spacing: 18–24 inches
• Season for Planting: Fall (best for natural stratification) or early spring
• Germination Time: 20–40 days
• Germination Temperature: 65–75°F
• Cold Stratification: 30–60 days recommended
• Growth Rate: Moderate
• Maintenance Level: Low

Planting Guide

• Soil Preparation: Choose a sunny location with moist, well-draining soil.
• Sowing Time: Plant in fall for natural cold stratification or in early spring after manual stratification.
• Seed Depth: Press seeds onto soil surface; cover lightly with a thin layer of soil.
• Watering for Germination: Keep soil consistently moist until seedlings emerge.
• Germination Window: 20–40 days when properly stratified.
• Light Requirements: Full sun is essential for strong flowering.
• Thinning: Space seedlings 18–24 inches apart.
• Watering: Water regularly during establishment; becomes more tolerant with maturity.
• Maintenance Tips: Deadhead if controlling spread; allow seed heads to mature for natural reseeding.
• Overwintering: Hardy perennial; no special protection needed in most climates.