'Iron Butterfly' is a vigorous ironweed cultivar selected for its compact, densely mounding habit and showy, long-lasting display of purple blooms.
- Type: Perennial
- Zone: 4 to 9
- Height: 2.00 to 3.00 feet
- Spread: 2.00 to 3.00 feet
- Bloom Time: July to August
- Bloom Description: Purple
- Sun: Full sun
- Water: Dry to medium
- Maintenance: Low
- Flower: Showy
- Attracts: Hummingbirds, Butterflies
- Tolerate: Drought, Erosion, Dry Soil, Shallow-Rocky Soil