Missouri Ironweed (Vernonia missurica) is a striking native perennial with vibrant purple flower clusters, attracting pollinators to gardens and natural areas.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
75% intensity
Thrives in 6-8 hours of direct sunlight per day. Can tolerate partial shade, but flowering may be reduced.
Consistent Moisture
50% intensity
Prefers moist soil but dislikes waterlogged conditions. Water when top soil is dry.
Clay, Loam, Sandy; Well-drained
50% intensity
Hardy Perennial
50% intensity
Tolerates a wide range of temperatures, hardy in USDA zones 4-8. Protect from extreme heat and frost.
Low
25% intensity
Requires minimal fertilization. A light feeding in spring is usually sufficient. Avoid over-fertilizing.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Missouri Ironweed thrives in consistently moist soil. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogged conditions, which can lead to root rot.
During prolonged dry spells, especially in hot weather, increase watering frequency to maintain optimal soil moisture.
Prune back dead or damaged stems in late winter or early spring. To encourage bushier growth and more blooms, you can pinch back the tips of young plants in late spring.
Deadheading spent flowers can prevent self-seeding and prolong the blooming period.
Missouri Ironweed can be propagated by division of clumps in early spring. Sow seeds outdoors in fall or stratified indoors in early spring.
Cuttings can also be taken from young stems in late spring or early summer and rooted in moist potting mix.
As a perennial, Repotting is not typically necessary for established garden plants. If growing in a container, repot every 2-3 years in early spring into a slightly larger pot with fresh, well-draining potting mix.
Ensure the new pot has adequate drainage holes.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Missouri Ironweed (Vernonia missurica)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Vernonia |
| Species | Vernonia missurica |
Similar in genus Vernonia
Answers based on plant encyclopedia data
