Quick answer: Inland sea oats (Chasmanthium latifolium) is native to 3 states. What's commonly sold under this name is the true wild species. It's typically seed, 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 | Part Shade, Shade |
|---|---|
| Water | Medium water, Moist |
| Soil | Moist sands, loams, and clays, poorly drained okay |
| Bloom | Bloom Jun-Sep |
| Height | 2-4 ft tall |
| Wildlife value | Seeds feed small mammals and birds, larval host for skipper butterflies |
Invasive / regulated
Reseeds easily and can expand aggressively within a couple years forming solid mats in moist loams; not formally regulated.
Buying it
Wild species
Sold true to the wild species as of the last check (16 Sep 2026), via Amazon.
Sold as: Seed via Amazon · listing verified 16 Sep 2026
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