// SPECIES PROFILE · PERENNIAL · NATIVE

Interior ironweed

Vernonia baldwinii ssp. interior

Interior ironweed (Vernonia baldwinii ssp. interior) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–10a. Mature size 2'–5'. Blooms Jul–Nov.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 13 U.S. states, including AR, CO, IA, IL, KS, LA…
USDA hardiness: Zones 2b–10a
Mature size: 2'–5'
Sun: Full sun
Water: Low · xeric
Bloom: Jul–Nov
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Interior ironweed (Vernonia baldwinii ssp. interior) — *Vernonia baldwinii ssp. interior* — Interior ironweed. Photo via iNaturalist — (c) Sam Kieschnick, some rights reserved (CC BY).

Field Notes

[ growing · ecology · siting · care ]

Interior ironweed (Vernonia baldwinii ssp. interior) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–10a. Mature size 2'–5'. Blooms Jul–Nov. Low water use makes it a strong candidate for xeric and drought-conscious plantings.

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, interior ironweed pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Butterfly Milkweed (Asclepias tuberosa), Carolina Larkspur (Delphinium carolinianum), Compass Plant (Silphium laciniatum).