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// SPECIES PROFILE · ANNUAL · NATIVE

Southwestern cosmos

Cosmos parviflorus

Southwestern cosmos (Cosmos parviflorus) is a annual in the — family. Native range includes MO — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 2b–10b. Blooms Jun–Oct.

// QUICK FACTS
Family
—
Group
annual
Native range
Native to 9 U.S. states, including AZ, CO, MA, MD, ME, MO…
USDA hardiness
Zones 2b–10b
Mature size
—
Sun
Full sun
Water
—
Bloom
Jun–Oct
Wildlife value
Pollinator and wildlife support
Ecological role
native species profile
Southwestern cosmos (Cosmos parviflorus)
Cosmos parviflorus — Southwestern cosmos. Photo by Craig Martin via Wikimedia Commons (CC0).

Field Notes

[ growing · ecology · siting · care ]

Southwestern cosmos (Cosmos parviflorus) is a annual in the — family. Native range includes MO — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 2b–10b. Blooms Jun–Oct.

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, southwestern cosmos pairs naturally with: Common Sunflower (Helianthus annuus), Plains Coreopsis (Coreopsis tinctoria), Swamp verbena (Verbena hastata), Slim amaranth (Amaranthus hybridus).

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