// SPECIES PROFILE · PERENNIAL · NATIVE

Roughstem rosinweed

Silphium radula

Roughstem rosinweed (Silphium radula) is a perennial in the — family. Native range includes AR, OK. Hardy in zones 5b–10a. Mature size 38"–8'. Blooms Jun–Aug.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 9 U.S. states, including AL, AR, GA, LA, MS, NC…
USDA hardiness: Zones 5b–10a
Mature size: 38"–8'
Sun: Full sun
Water: —
Bloom: Jun–Aug
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Roughstem rosinweed (Silphium radula) — *Silphium radula* — Roughstem rosinweed. Photo by Eric Hunt via Wikimedia Commons (CC BY-SA 4.0).

Field Notes

[ growing · ecology · siting · care ]

Roughstem rosinweed (Silphium radula) is a perennial in the — family. Native range includes AR, OK. Hardy in zones 5b–10a. Mature size 38"–8'. 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, roughstem rosinweed pairs naturally with: American Lotus (Nelumbo lutea), Broadleaf Arrowhead (Sagittaria latifolia), Blue-Eyed Grass (Sisyrinchium angustifolium), Butterfly Milkweed (Asclepias tuberosa).