Vernonia lettermannii 'Iron Butterfly'
Vernonia 'Iron Butterfly' photo courtesy of North Creek Nursery


Iron Butterfly is a showy selection of Letterman's Ironweed, a native wildflower from Arkansas. This densely branched perennial has bright green, finely textured foliage and bright violet-purple flowers in late summer. Attracts butterflies and bees galore. Drought resistant/drought tolerant plant

  • Height: 61 - 91 cm (24 - 36 in)
  • Spread: 46 - 61 cm (18 - 24 in)
  • Cold Hardiness: Zone 4-9
  • Sun or Shade: minimum 6 hours of direct sun
  • Bloom Time: late summer to fall
  • Leaf Colour: green
  • Bloom Colour: violet
  • Critter Resistance: deer and rabbits
  • Nature Attraction: butterflies and bees

Growing and Maintenance Tips

Vernonia lettermannii 'Iron Butterfly' prefers sunny sites with average to dry soils. Plants tolerate clay, rocky and gravelly soils, alkaline pH, drought and temporary inundation by water.