// SPECIES PROFILE · ANNUAL · NATIVE

Annual ragweed

Ambrosia artemisiifolia var. artemisiifolia

Annual ragweed (Ambrosia artemisiifolia var. artemisiifolia) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–9a. Mature size 2'–5'. Blooms Jun–Aug.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 49 U.S. states, including AL, AR, AZ, CA, CO, CT…
USDA hardiness: Zones 2b–9a
Mature size: 2'–5'
Sun: Part shade
Water: —
Bloom: Jun–Aug
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Annual ragweed (Ambrosia artemisiifolia var. artemisiifolia) — *Ambrosia artemisiifolia var. artemisiifolia* — Annual ragweed. Photo via iNaturalist — (c) Qwert1234, some rights reserved (CC BY-SA).

Field Notes

[ growing · ecology · siting · care ]

Annual ragweed (Ambrosia artemisiifolia var. artemisiifolia) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–9a. Mature size 2'–5'. Blooms Jun–Aug.

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, annual ragweed pairs naturally with: Common Sunflower (Helianthus annuus), Swamp verbena (Verbena hastata), Lambsquarters (Chenopodium album), Pitseed goosefoot (Chenopodium berlandieri).