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Vernonia noveboracensis

New York ironweed add to wishlist

Plant types and subtypes: Perennials

Light Requirements: sun, part-sun

Water Use: low

Soil Moisture: dry, moist

Soil Description: acid, neutral, rich, average, clay

Height: 4'-7'

Bloom Time: August, September

Bloom Color: purple

Leaf Color: green

Hardiness Zone: 5, 6, 7, 8

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

Flowers of Vernonia noveboracensis  (New York ironweed)
  • Flowers of Vernonia noveboracensis  (New York ironweed)
  • Flowers of Vernonia noveboracensis  (New York ironweed)
  • Seed head of Vernonia noveboracensis  (New York ironweed)
  • Flowers of Vernonia noveboracensis  (New York ironweed)

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Description

Vernonia noveboracensis

Also known as:

New York ironweed

,

ironweed

Scientific Synonyms:

Vernonia harperi

Description

Stunning for its height and the profusion of flowers it produces, Vernonia noveboracensis can exceed 6'. It is a robust plant -- hence the common name 'ironweed' -- that bears large terminal clusters of fluffy purple flowers. The deep-green leaves are lance-like and add an ornamental value to the plant when not in bloom.

Cultivation

Vernonia noveboracensis does very well in a wide variety of soils, including poorly drained ones. It is perfectly adapted to typical garden conditions, in full or part-sun. Because of its size, it is best planted in the back of a flower bed where it will provide a colorful backdrop 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. Blooms August and September. Zones 5-8

Propagation

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:
AL, CT, DC, DE, FL, GA, KY, MA, MD, NC, NH, NJ, NM, NY, OH, PA, RI, SC, TN, VA, WV

USDA Endangered Status:

  • Presumed Extirpated: OH
  • Special Concern: KY

Classification

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 noveboracensis New York ironweed