threadleaf ironweed
Vernonia Lettermannii 'Iron Butterfly'
Grow conditions
- Sunlight
- Full sun, Partial sun
- Hardiness zone
- 4-9
- Minimum temperature
- −29°F (−34°C)
- Soil type
- Loam, Sandy, Well-drained
- Soil pH
- Acidic, Neutral, Alkaline
Plant traits
Mature height36 in
Mature width24 in-36 in
Plant typePerennials
Bloom seasonSummer
Foliage typeDeciduous
Tolerance & safety
Drought tolerantNo
Pet safeSafe
Deer resistantNo
Pollinator-friendlyBees, Butterflies
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