Vernonia gigantea ssp. gigantea

Giant Ironweed

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Giant ironweed is a perennial plant that is native to the eastern parts of the US where it grows in locations that are consistently moist. It bears smallish bright purple flowers large bracts in late summer to mid-fall providing an unusual pop of tall color in the late season. Giant ironweed grows to a height of about eight feet and a width of about seven feet in sunny conditions, and slightly less in shadier spots. It can become weedy, so care should be taken in siting it, and removing unwanted shoots. In an evaluation of ironweeds conducted at the Chicago Botanic Garden, this form of giant ironweed received a good rating for growing in local conditions. This particular ironweed shares its common name with Vernonia gigantea so before purchasing it is advisable to check the correct botanical name.
Plant Shape
Full Sun, Partial Shade
Bloom Time
July - August, September - October
Bloom Color
Red, Purple
Landscape Use
Screen/Hedge, Bedding or Border
Wildlife Interest
Attracts Birds, Attracts Butterflies, Resistant To Deer, Native to Midwest
Plant Type
Hardiness Zone
3 - 9