Vernonia Species, Western Ironweed, Baldwin's Ironweed

Vernoniabaldwinii

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Vernonia (ver-NON-ee-uh)
Species
baldwinii (bald-WIN-ee-eye)
Synonym
Vernonia duggariana
Vernonia interior
Vernonia parthenioides
Vernonia sphaeroidea
Sun Exposure
Sun to Partial Shade
Foliage
Herbaceous
Smooth
Height
36-48 in. (90-120 cm)
Spacing
18-24 in. (45-60 cm)
Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Bloom Color
Medium Purple
Bloom Time
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
May be a noxious weed or invasive
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; direct sow after last frost
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Denver, Colorado

Shawnee Mission, Kansas

Cole Camp, Missouri

Jay, Oklahoma

Arlington, Texas

Austin, Texas

Fort Worth, Texas(2 reports)

Hubbard, Texas

Lipan, Texas

Santo, Texas

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Gardener's Notes:

2
positives
1
neutral
0
negative
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J
J
Shawnee Mission, KS | December 2007 | positive

Beautiful, reliable, tall plant that attracts skipper and other butterflies and bees in late summer in Overland Park, KS. I have to stak...Read More

F
Josephine, Arlington, TX (Zone 8a) | February 2004 | positive

Ironweed is a lovely plant that will stand upright without staking.
The flowers look like soft brushes and are a beautiful shade o...Read More

T
T
Murfreesboro, TN (Zone 7a) | August 2001 | neutral

Vernonia is a native wildflower with coarse leaves and late-blooming flowers. It works well as a backdrop to other plants. Seeds readil...Read More

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