Vernonia, Narrow-Leaf Ironweed 'Iron Butterfly'

Vernonialettermannii

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Vernonia (ver-NON-ee-uh)
Species
lettermannii (let-ter-MAH-nee-eye)
Synonym
Cacalia lettermannii
Sun Exposure
Sun to Partial Shade
Foliage
Herbaceous
Height
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Spacing
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
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
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
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
Soil pH requirements
Patent Information
Propagation Methods
Seed Collecting
Regional

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

Francestown, New Hampshire

High Point, North Carolina

West Chester, Pennsylvania

Wilkes Barre, Pennsylvania

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Gardener's Notes:

1
positive
0
neutral
0
negative
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Downingtown, PA | September 2015 | positive

This is an easy to grow, fine-textured, handsome perennial. It is relatively new to the market, sold by both native plant and conventiona...Read More

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