Ironweed

Vernonia × illinoensis

Ironweed (Vernonia × illinoensis) is a perennial in the — family. Native range includes AR, MO, OK. Hardy in zones 3a–11b. Blooms Jun–Sep.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 15 U.S. states, including AL, AR, FL, GA, IL, IN…
USDA hardiness: Zones 3a–11b
Mature size: —
Sun: —
Water: —
Bloom: Jun–Sep
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Field Notes

[ growing · ecology · siting · care ]

Ironweed (Vernonia × illinoensis) is a perennial in the — family. Native range includes AR, MO, OK. Hardy in zones 3a–11b. Blooms Jun–Sep.

Why it's on this list: native species profile. Native-range data from the Lady Bird Johnson Wildflower Center (NPIN), cross-checked against iNaturalist observations. Part of Rooted Revival's regional native plant catalog — true natives for Oklahoma, Arkansas, Missouri and Kansas.

Companion Planting

[ guild · polyculture · cross-layer pairings ]

In the same native range, ironweed pairs naturally with: American Lotus (Nelumbo lutea), Broadleaf Arrowhead (Sagittaria latifolia), Blue-Eyed Grass (Sisyrinchium angustifolium), Butterfly Milkweed (Asclepias tuberosa).

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