// SPECIES PROFILE · PERENNIAL · NATIVE

Cuman ragweed

Ambrosia psilostachya

Cuman ragweed (Ambrosia psilostachya) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–11b. Mature size 6"–3'.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 42 U.S. states, including AL, AR, AZ, CA, CO, CT…
USDA hardiness: Zones 2a–11b
Mature size: 6"–3'
Sun: Part shade
Water: —
Bloom: —
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Cuman ragweed (Ambrosia psilostachya) — *Ambrosia psilostachya* — Cuman ragweed. Photo by Krzysztof Ziarnek Kenraiz via Wikimedia Commons (CC BY-SA 4.0).

Field Notes

[ growing · ecology · siting · care ]

Cuman ragweed (Ambrosia psilostachya) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–11b. Mature size 6"–3'.

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, cuman ragweed pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Lady Fern (Athyrium filix-femina), Wild Strawberry (Fragaria virginiana), Yarrow (Achillea millefolium).