Quick answer: Large penstemon (shell-leaf beardtongue) (Penstemon grandiflorus) is native to 12 states. What's commonly sold under this name is the true wild species. It's typically seeds, verified 16 Sep 2026.
Photo: Evan Grimes https://www.inaturalist.org/people/evangrimes, Wikimedia Commons (CC BY 4.0)
Where it's native
Listed in the directory as native to these states. Click a state for its full native-plant guide.
Growing conditions
From the Lady Bird Johnson Wildflower Center Native Plant Database.
| Sun | Full sun |
|---|---|
| Water | Not recorded in the wildflower.org profile |
| Soil | Sandy |
| Bloom | May-Jun |
| Height | Up to 4 ft |
| Wildlife value | Special value to native/bumble bees |
occasionally escapes cultivation in the East; no formal invasive status
Buying it
Sold true to the wild species as of the last check (16 Sep 2026), via Amazon.
Sold as: Seeds via Amazon · listing verified 16 Sep 2026
See where to buy →Quick answers about Large penstemon (shell-leaf beardtongue)
Where is Large penstemon (shell-leaf beardtongue) native?
Large penstemon (shell-leaf beardtongue) (Penstemon grandiflorus) is native to 12 states across the Midwest and South. Check your state's page in this directory for the full list of plants native where you live.
When does Large penstemon (shell-leaf beardtongue) bloom?
Large penstemon (shell-leaf beardtongue) blooms May-Jun. Exact timing shifts a few weeks with latitude and elevation.
What growing conditions does Large penstemon (shell-leaf beardtongue) need?
Light: Full sun. Soil: Sandy. Mature height: Up to 4 ft.
Is Large penstemon (shell-leaf beardtongue) good for pollinators and wildlife?
Yes. Wildlife value: Special value to native/bumble bees.
Is Large penstemon (shell-leaf beardtongue) deer-resistant or drought-tolerant?
Large penstemon (shell-leaf beardtongue) is deer-resistant.
Where can I buy real Large penstemon (shell-leaf beardtongue) seed or plants?
We found a listing sold as seeds that names the true species, last checked 16 Sep 2026. Look for the scientific name Penstemon grandiflorus on any listing.
Similar native plants
Native plants that share growing conditions or range with Large penstemon (shell-leaf beardtongue).
- Prairie ironweed Vernonia fasciculata
- Prairie onion Allium stellatum
- Prairie tickseed Coreopsis palmata
- Narrow-leaf coneflower Echinacea angustifolia
- Leadplant Amorpha canescens
- Mexican hat Ratibida columnifera
Also listed under
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