Quick answer: Great blue lobelia (Lobelia siphilitica) is native to 32 states. What's commonly sold under this name is the true wild species. It's typically seed, verified 15 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 | Sun, Part Shade, Shade |
|---|---|
| Water | Moist-Wet, low drought tolerance |
| Soil | Clay, loam, sand |
| Bloom | Bloom Jul-Oct |
| Height | Up to 5 ft tall |
| Wildlife value | Attracts birds and hummingbirds, special value to native and bumble bees |
All parts toxic only if eaten in large quantities. Symptoms: nausea, vomiting, diarrhea, salivation, exhaustion/weakness, pupil dilation, convulsions, coma. Toxic compounds: alkaloids lobelamine, lobeline, volatile oils
Buying it
Sold true to the wild species as of the last check (15 Sep 2026), via Amazon.
Sold as: Seed via Amazon · listing verified 15 Sep 2026
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