Water
Water regularly, keeping the soil consistently moist but not waterlogged. Allow the top inch of soil to dry out between waterings, especially during the warmer months.
Reduce watering frequency in fall and winter to prevent root rot.
Also known as Tall Ironweed
Vernonia angustifolia, Narrow Leaf Ironweed, is a native perennial wildflower producing clusters of purple flowers atop slender stems, attracting pollinators.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun to partial shade
75% intensity
Thrives in at least 6 hours of direct sunlight daily for best flowering.
Consistent moisture
50% intensity
Prefers evenly moist soil; allow top layer to dry slightly between waterings.
Well-drained
50% intensity
Moderate
50% intensity
Prefers average room temperatures between 18-24°C during the day.
Light feeding
25% intensity
Fertilize sparingly in spring with a balanced, slow-release fertilizer.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Non-toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly, keeping the soil consistently moist but not waterlogged. Allow the top inch of soil to dry out between waterings, especially during the warmer months.
Reduce watering frequency in fall and winter to prevent root rot.
Prune back dead or damaged stems anytime. To encourage bushier growth and more blooms, pinch back young plants in early spring.
After flowering, deadhead spent blooms to prevent seed formation and potentially encourage a second bloom.
Propagate by seeds sown in spring or by stem cuttings taken in late spring or early summer. Seeds can be sown directly outdoors after the last frost or started indoors a few weeks prior.
Cuttings root well in moist potting mix.
Repot container-grown plants every 2-3 years or when root-bound. Spring is the ideal time to repot, usually before new growth begins.
Use a well-draining potting mix and choose a pot that is slightly larger than the current one.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Narrow Leaf Ironweed (Vernonia angustifolia)
Where Narrow Leaf Ironweed (Vernonia angustifolia) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Vernonia |
| Species | Vernonia angustifolia |
Similar in genus Vernonia
Answers based on plant encyclopedia data
