// SPECIES PROFILE · PERENNIAL · NATIVE

Thinleaf sunflower

Helianthus decapetalus

Thinleaf sunflower (Helianthus decapetalus) is a perennial in the — family. Native range includes KS, MO, OK. Hardy in zones 3a–10a. Mature size 29"–6'. Blooms Jun–Nov.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 31 U.S. states, including AL, CT, DC, DE, GA, IA…
USDA hardiness: Zones 3a–10a
Mature size: 29"–6'
Sun: Part shade
Water: —
Bloom: Jun–Nov
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Thinleaf sunflower (Helianthus decapetalus) — *Helianthus decapetalus* — Thinleaf sunflower. Photo by Fritzflohrreynolds via Wikimedia Commons (CC BY-SA 3.0).

Field Notes

[ growing · ecology · siting · care ]

Thinleaf sunflower (Helianthus decapetalus) is a perennial in the — family. Native range includes KS, MO, OK. Hardy in zones 3a–10a. Mature size 29"–6'. Blooms Jun–Nov.

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