Prairie Ironweed
Vernonia fasciculata
- Native to:
- Canada, United States
cultivar413





Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Vernonia
- Species:
- Vernonia fasciculata
- USDA Symbol:
- VEFA2
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 150 cm
- Light Requirements:
- Full Sun,Part Shade,Shade
- Drought Tolerance:
- Low
- Bloom Months:
- jul,aug,sep
- Bloom Colors:
- purple, magenta
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Keystone Species Ranking
- Pollen Specialist Bee Keystone:
- ★★☆☆☆ Native pollen specialist bee species supported by this genus (NWF)
Host Plant for Caterpillars
Coleophora vernoniaeella, Northern Burdock Borer (Papaipema circumlucens), Spotted Tussock Moth (Lophocampa maculata)
Reported Fauna Sightings
Bees: American bumble (Bombus pensylvanicus), Brown-belted bumble bee (Bombus griseocollis), Common eastern (Bombus impatiens), 🛑Rusty-patched bumble (Bombus affinis) Butterflies:Eastern Tiger Swallowtail (Papilio glaucus)
Garden & Ecology Notes
- Wildlife Value:
- butterflies, bees, birds
- Deer Resistant:
- Yes
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts vigorously from rootstock following fire; benefits from periodic burning in prairie management.
Soil Requirements
- Soil Type:
- rich, well-drained loamy soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- Prefers wet prairies and meadows
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–28 days
- Notes:
- Seeds require light for germination; surface sow and do not cover.
The above propagation data sourced from Claude AI
Pre-treatment: Single-step cold-moist stratification for temperate woodland species. for 60–120 days
Source: Claude AI
ORGHPS Germination Guide: Sow @ 4C for 3 months, then place @ 20C for 3 months.