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Vernonia glauca

broadleaf ironweed add to wishlist

Plant types and subtypes: Perennials

Light Requirements: sun, part-sun

Water Use: low

Soil Moisture: dry, moist

Soil Description: rich, average, loam, clay

Height: 3'-5'

Bloom Time: July, August, September

Bloom Color: purple

Leaf Color: green

Hardiness Zone: 6, 7, 8

Additional Tags: attracts bees, attracts birds, attracts butterflies, attracts hummingbirds, clumping, colonizing, cottage garden plant, naturalizing, ornamental foliage, rare

Vernonia glauca (broadleaf ironweed)
  • Vernonia glauca (broadleaf ironweed)
  • Vernonia glauca (broadleaf ironweed)

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Vernonia glauca

Also known as:

broadleaf ironweed


upland ironweed


tawny ironweed



Scientific Synonyms:

Vernonia noveboracensis var. tomentosa


Vernonia glauca is similar, but shorter, to the more commonly found V. noveboracensis. It grows to a height of 5' and bears large terminal clusters of fluffy purple flowers. The deep-green leaves are lance-like and also attractive. It bears large terminal clusters of fluffy purple flowers. The deep-green leaves are lance-like and also attractive.


Adapted to sunny conditions, Vernonia glauca does very well in a wide variety of soil conditions.It is ideal for perennial flower beds, cottage gardens and sunny borders. Because of its size, it is best planted in the back of a flower bed where it will provide a colorful focal point in late summer through early fall. The height of the plant may be controlled by cutting it back hard in late spring. This will also promote the growth of additional flowering stems. Self seeds readily, and is a good choice for mass roadside plantings, or naturalized in a meadow setting. Blooms mid-July through September. Zones 6-8


Propagate by dividing mature clumps in early spring, or from softwood cuttings in late spring. Collected seeds should be sown immediately or they will require cold stratification.

Additional Notes

The common name ironweed, might be attributed to the rigid, tough stems of the plant, as well as the rust color the flowers take on as they fade.

Native Range & Classification

Recorded County Distribution: USDA data

Native Range:

USDA Endangered Status:

  • Endangered: NJ, PA


Kingdom Plantae Plants
Subkingdom Tracheobionta Vascular plants
Superdivision Spermatophyta Seed plants
Division Magnoliophyta Flowering plants
Class Magnoliopsida Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae Aster family
Genus Vernonia ironweed
Species Vernonia glauca broadleaf ironweed