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New York Ironweed

Photos are representative and may not match your specific variety.

New York Ironweed

Native wildflower

Vernonia noveboracensis

  • Partial sun
  • Zones 5–9
  • 60 days to maturity
  • Flowers
  • 24" spacing
  • Moderate water
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  • Overview

    New York Ironweed (Vernonia noveboracensis) is a perennial native wildflower. Hardy in USDA zones 5 to 9. Prefers full sun.

  • Planting

    Direct sow in fall (September–October) for natural winter stratification, or start indoors in late winter with 30-day cold stratification. Transplant after last frost date.

  • Growing

    Sun: partial. Water: moderate. Soil: Adaptable; prefers well-drained soil, neutral to slightly acidic. Does not require rich amendments.. Space plants 24" apart. Germination: 10–21 days.

  • Pests & diseases

    Common pests: Japanese beetles (minor), spider mites in extremely dry conditions. Common diseases: Powdery mildew (in humid conditions with poor air circulation), leaf spot (rarely problematic).