Quick answer: Large penstemon (shell-leaf beardtongue) (Penstemon grandiflorus) is native to 8 states. What's commonly sold under this name is the true wild species. It's typically seeds, verified 16 Sep 2026.
Where it's native
Listed in the register 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 |
Invasive / regulated
occasionally escapes cultivation in the East; no formal invasive status
Buying it
Wild species
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
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