Tall White Boneset (Eupatorium perfoliatum) Thoroughwort Flower Seeds

Tall White Boneset (Eupatorium perfoliatum), also known as Thoroughwort, is a hardy North American native perennial known for its tall stature and clusters of bright white summer blooms. This non-GMO seed variety thrives in moist soils, wetlands, meadows, and naturalized landscapes, making it a top choice for wildlife-friendly and pollinator gardens. With its attractive blooms and strong adaptability, Tall White Boneset is excellent for adding height, texture, and ecological value to US garden environments.

Features

• Native US perennial with tall, upright growth
• Produces dense clusters of white summer blooms
• Excellent for pollinator gardens, meadows, and wetland areas
• Non-GMO heirloom seed variety
• Thrives in moist soils and tolerates periodic flooding
• Attracts butterflies, bees, and beneficial insects
• Strong, dependable plant suited for naturalized plantings
• Provides seasonal color and vertical structure

Specifications

• Common Name: Tall White Boneset, Thoroughwort
• Scientific Name: Eupatorium perfoliatum
• Plant Type: Perennial
• USDA Zones: 3–9
• Season: Summer blooming
• Height: 36–60 inches
• Bloom Color: White
• Foliage: Perfoliate leaves that clasp the stem
• Heirloom: Yes
• GMO Status: Non-GMO
• Organic: Not certified organic
• Light Requirements: Full sun to partial shade
• Soil Preference: Moist, rich, or wet soils
• Water Needs: Moderate to high moisture
• Growth Rate: Moderate
• Heat Tolerance: High
• Cold Tolerance: Excellent
• Plant Spacing: 18–24 inches
• Seed Longevity: 1–3 years stored in a cool, dry place

Planting Guide 

• Sowing Method: Direct sow outdoors or start indoors.
• Seed Preparation: Surface sow; requires light for germination.
• When to Plant:
• Early spring after frost
• Late fall for natural cold stratification
• Sowing Depth: Surface sow; do not bury.
• Germination Time: 20–40 days depending on temperature.
• Light Requirements: Full sun or partial shade.
• Soil Conditions: Prefers moist to wet soil; ideal for rain gardens or wetland edges.
• Watering: Keep soil consistently moist during germination.
• Maintenance:
• Cut back stems in late fall or early spring
• Allow natural spreading for larger colonies