// SPECIES PROFILE · PERENNIAL · NATIVE

Roundleaf thoroughwort

Eupatorium rotundifolium var. ovatum

Roundleaf thoroughwort (Eupatorium rotundifolium var. ovatum) is a perennial in the — family. Native range includes AR — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 3a–11b. Mature size 6"–3'. Blooms Jul–Oct.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 23 U.S. states, including AL, AR, CT, DC, DE, FL…
USDA hardiness: Zones 3a–11b
Mature size: 6"–3'
Sun: —
Water: —
Bloom: Jul–Oct
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Roundleaf thoroughwort (Eupatorium rotundifolium var. ovatum) — *Eupatorium rotundifolium var. ovatum* — Roundleaf thoroughwort. Photo via iNaturalist — no rights reserved, uploaded by Becky Dill.

Field Notes

[ growing · ecology · siting · care ]

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, roundleaf thoroughwort pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Blue-Eyed Grass (Sisyrinchium angustifolium), Butterfly Milkweed (Asclepias tuberosa), Cardinal Flower (Lobelia cardinalis).