// SPECIES PROFILE · PERENNIAL · NATIVE

Tall rattlesnakeroot

Prenanthes altissima

Tall rattlesnakeroot (Prenanthes altissima) is a perennial in the — family. Native range includes AR, MO, OK. Hardy in zones 3a–10a. Mature size 38"–8'. Blooms Aug–Nov.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 29 U.S. states, including AL, AR, CT, DE, GA, IL…
USDA hardiness: Zones 3a–10a
Mature size: 38"–8'
Sun: —
Water: —
Bloom: Aug–Nov
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Tall rattlesnakeroot (Prenanthes altissima) — *Prenanthes altissima* — Tall rattlesnakeroot. Photo by Ava Olyer via Wikimedia Commons (CC0).

Field Notes

[ growing · ecology · siting · care ]

Tall rattlesnakeroot (Prenanthes altissima) is a perennial in the — family. Native range includes AR, MO, OK. Hardy in zones 3a–10a. Mature size 38"–8'. Blooms Aug–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, tall rattlesnakeroot pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Blue-Eyed Grass (Sisyrinchium angustifolium), Butterfly Milkweed (Asclepias tuberosa), Cardinal Flower (Lobelia cardinalis).