Quick answer: 15 native Louisiana plants have a recorded bloom range that includes October.
15 species
- Big bluestem Andropogon gerardii · 25 states
- Black-eyed Susan Rudbeckia hirta · 42 states
- Blue mistflower Conoclinium coelestinum · 26 states
- Cardinal flower Lobelia cardinalis · 37 states
- Carolina jessamine Gelsemium sempervirens · 9 states
- Great blue lobelia Lobelia siphilitica · 32 states
- Loblolly bay Gordonia lasianthus · 5 states
- Mexican hat Ratibida columnifera · 17 states
- Pink-scale blazing star Liatris elegans · 5 states
- Prairie blazing star Liatris pycnostachya · 16 states
- Sideoats grama Bouteloua curtipendula · 25 states
- Swamp sunflower Helianthus angustifolius · 15 states
- Switchgrass Panicum virgatum · 24 states
- Virginia saltmarsh mallow Kosteletzkya pentacarpos · 4 states
- Witch-hazel Hamamelis virginiana · 28 states