Quick answer: Swamp sunflower (Helianthus angustifolius) is native to 15 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 |
|---|---|
| Water | Medium water, Wet |
| Soil | Sandy, sandy loam, medium loam, clay loam, clay, acid-based soils |
| Bloom | Bloom Aug-Nov |
| Height | Up to 5 ft tall |
| Wildlife value | Attracts birds, special value to native bees |
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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