// SPECIES PROFILE · PERENNIAL · NATIVE

Large penstemon

Penstemon grandiflorus

Large penstemon (Penstemon grandiflorus) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–10a. Blooms May–Jun.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 16 U.S. states, including AR, CO, IA, IL, KS, MN…
USDA hardiness: Zones 2a–10a
Mature size: —
Sun: Full sun
Water: —
Bloom: May–Jun
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Large penstemon (Penstemon grandiflorus) — *Penstemon grandiflorus* — Large penstemon. Photo via iNaturalist — (c) Aaron Carlson, some rights reserved (CC BY), uploaded by Aaron Carlson.

Field Notes

[ growing · ecology · siting · care ]

Large penstemon (Penstemon grandiflorus) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–10a. Blooms May–Jun.

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, large penstemon pairs naturally with: Aromatic Aster (Symphyotrichum oblongifolium), Broadleaf Arrowhead (Sagittaria latifolia), Gray Goldenrod (Solidago nemoralis), Lady Fern (Athyrium filix-femina).