Vernonia altissima - Tall Ironweed

Vernonia altissima - Tall Ironweed

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Ever seen a Yellow Swallowtail Butterfly on Tall Ironweed? The contrast is spectacular given the purple flowers and this late blooming perennial provides the perfect landing pad.

Tall Ironweed can reach heights over 7 feet tall and blooms July through September. It prefers full sun and moderately damp soils conditions.

What is Stratification?

Seed Info

Seed Envelopes contain approximately 0.02 ounces of seed and cover about 5 to 10 square feet. 

Product Details 

Flower Color: Purple

Height: 4 to 7 Feet

Light Requirements: Full Sun to Shade

Soil Hydrology: Mesic to Wet Soils

Bloom Time: July through September

Plant Type: Perennial

Stratification: Cold Moist (CM) 60 Days

Attracts: Bees, Butterflies